Earlier quoted context omitted.
> I am not going to build my PIM around proprietary tool with subscription! If your concern is about the lack of a clear migration path, Obsidian vaults are just folders with markdown files, which can be used with absolutely anything, you can literally use them in Emacs or VSCode if you want. The most popular PDF annotation plugin is AGPL-3 licensed and its format is also transparent so you can migrate to something e…
> which can be used with absolutely anything Not really, markdown has tons of tiny implementation details. And I can not use PDF annotation plugin in Emacs...
> markdown has tons of tiny implementation details. And I can not use PDF annotation plugin in Emacs
The same can be said about any other open format, I guess. There's no free lunch, you're always locked in by the implementation/workflow details, and have to write actual code (or use the code written by someone else) to migrate off to a different tool. The point is to not be locked by the format obfuscation or the storage.