I have a haphazard way of managing notes and docs that has too much overhead.
I would like a squirrel program to store and retrieve more easily and will eventually just write one.
I think we need more tools that rely on self-hosting cheap nodes for data where the owner has complete control. Knowledge management systems are really personal and if third parties go away then that is critically bad. I intend to keep this info for 50-100 years so need something that does a good job of just storing to git or whatever and then rely on different front-ends and things that can be run without any third party access to data.
The iOS model is closest to this in terms of data and apps, but is not OSS and I spend so much time in front of a full computer so phone access only is too limited.