[Casteil]

Came here to say as much. No proprietary 'lock-in' with Obsidian, just plain .md, and honestly (if I recall correctly - it's been years now) I felt like I struggled using Notion's 'fancier' features. It seemed like copying/pasting out of it was often problematic.

Like others are saying, though, Notion is much more geared for collaboration. I couldn't care much less about that, so here I am with Obsidian, still, years later.