I’ve no problem with using LibreOffice for most of my document needs, but i haven’t found a good substitute for microsoft’s OneNote yet. I mainly use it to plan my RPG games and it helps a lot. What alternatives are there for organizing notes on linux, with similar features to those that OneNote provides?
Joplin also supports encryption straight out of the box, which is nice if one wants to host on a third party cloud. Native support for both Nextcloud (WebDAV) and Syncthing (Direct file sync) is nice if one wants to self-host.