How to Maintain Knowledge Over Decades
My goal is to setup a system that will live in decades. So here are my notes. Do I miss something ?
How to Maintain Knowledge Over Decades
Main Idea
Maintaining useful, living knowledge over decades requires systems that age well, resist fragmentation, and support reinterpretation. Long-term knowledge infrastructure must prioritize clarity, adaptability, and connection, not just storage.
Key Challenges
- Tool churn: Platforms change, shut down, or lose support
- Format decay: Proprietary formats become unreadable
- Cognitive drift: Your own goals, context, and understanding evolve
- Data bloat: Too much unstructured or duplicated information creates noise
Principles for Longevity
✅ Plain Text, Markdown, or Open Formats
- Avoid lock-in; prioritize portability
- Tools may change, but content remains usable
✅ Meaningful Linking Over Filing
- Use links, not folders
- Folders assume fixed hierarchies; links reflect thinking paths
✅ Regular Review & Revision
- Periodically re-read old notes
- Update with new insight; link forward rather than deleting
✅ Build for Retrieval, Not Storage
- Use search-friendly structure, tags, and titles
- Use maps of content (MOCs) or indexes for high-level orientation
✅ Keep It Personal
- Use your own language and structure
- Write notes as if your future self will need context and intent
✅ Store Thinking, Not Just Facts
- Capture why something mattered, not just what it said
- Embed your reflections, questions, and follow-ups
Tools That Support This
- Obsidian, Logseq, plaintext editors with Git backup
- Versioning tools (e.g. Git, Time Machine)
- Redundant backups (local + cloud)
- Plain file directory structures over proprietary databases
Habits for Decades-Long Use
- Weekly or monthly reviews of evolving topics
- Keep a "last touched" date
- Periodically rewrite core ideas from scratch for clarity
Mental Model
Think of your knowledge base as a perennial garden. Some plants return each season. Some go dormant. Some are replaced. But the soil improves over time.
Howdy, Stranger!
Comments
This summary is pretty good. I'd say you understand how to do it.
@zettelkasten said:
In general this is true. However, I agree with @tjex's arguments for a minimal set of folders. But I emphasize again that any folders would be a minimal set, and you should think through the rationale for that set as well as @tjex did.
How much you need to do this depends on your purposes for using your Zettelkasten. Some notes you may not need to re-read at all. I wouldn't re-read them just for the sake of re-reading. Have a purpose when you re-read.
Some people around here like Logseq. Others, including me, find it to be too extremely opinionated in its markup constraints. Its features come with the high price of these constraints. Obsidian, which elsewhere you said you use, is more forgiving in this regard.
In general, I find that the creation date of any information in the note system is much more important than the last-touched date; I mostly ignore the latter.
Sometimes I make batch changes to my notes using find-and-replace, which bumps the "date modified" metadata in the filesystem, so that a note's modification date is often meaningless to me.
The importance of the creation date is reflected in the fact that many people, including me, use the creation date as a UID (unique identifier). Unlike many other people, I generally treat information that I add to my note system as immutable: I don't change it, only append to it, and appending creates a new creation-date UID. I'm not recommending what I do; I'm just explaining why "last touched" date is unimportant for me. In any case, it's important to have some system of accurately tracking time metadata.
Backup is very important, but I see you have already put it into the list :-)
An issue than can threat the long lasting of the system is if it doesn't scale well. Meaning what, if the system become hard and frictioning to manage, to fed with new content or to consult, as it grows.
1) Scalability is not guaranteed or affected by a single issue. Some of the issues are already in the list.
According to my "Scalability note" :-):
2) I have a more generic "future-proof" dedicated note:
In the context of the tools, I've some notes about future proof:
In the context of content structure and content organization:
In the context of the development of content and ideas:
Let's not forget to include The Archive in this discussion. The more critical the thinking tool, the less it should change. That’s why I stick with The Archive. It does exactly what a Zettelkasten needs: plain text, timestamps, a link-based structure instead of folders, super fast search, backlinking, and no feature bloat—just the essentials, without distractions.
Meanwhile, tools like Obsidian and Logseq appear in fancy attire, promising the world with every new plugin. But here’s the catch: behind the gloss is the same lock-in and even more cognitive noise.
The Archive? It’s boring, and that’s the point. Like a library card, it’s stable, quiet, and built to last. No surprise updates. No visual chaos. Just a calm space for thinking that’ll still be working decades from now.
Minimalism is the feature. And when you’re building something meant to outlive trends, that matters more than glowing graphs or social clout.
Will Simpson
My peak cognition is behind me. One day soon, I will read my last book, write my last note, eat my last meal, and kiss my sweetie for the last time.
kestrelcreek.com
Thank you for your comment. I checking also Emacs solution but have not found any "easy" route in that path
That comes with the territory, I'm afraid
(Try Spacemacs for a smoother experience.)
Author at Zettelkasten.de • https://christiantietze.de/
With Emacs, unless it's already your tool, it's important that you don't overwhelm yourself with all the things that people tell you that you can do with it. The learning curve is definitely its biggest downside, but you can use Emacs in a minimalistic way if you choose to do so. I wish there is a good resource for non-programmer to learn from for those who wants to integrate Emacs to their PKM system.
I'm also interested in getting familiar with how The Archive does things mainly because it's the baseline system many people in this forum use. Unfortunately I'm not in the Apple camp, so I don't have hardware to run it.
That platform consideration is actually relevant to Emacs as well. I think that Emacs runs best in a Unix/Linux-like environment, so it may take a bit more effort to run it outside of that environment.