One thing Notion has going for it is: it's quite easy to backup all notes, with a single click you can request a zip of everything in readable form. I do this monthly, but you could do it more often obviously.

This is something Evernote has broken lately, there no way (I know of) to backup everything at once there, and I fear that every VC-backed app will sooner or later see that as a way to improve lock-in....