https://github.com/zadam/trilium#trilium-is-in-maintenance-m... seems relevant, and that's above and beyond the license difference between the two (I'm not looking for trouble, I'm only saying they are different)

There is an ongoing community effort to revive it: https://github.com/TriliumNext/Notes

I would switch from obsidian to trilium if only they didn't block using h1 (aka # headings).

I read the explination about it being reseved for the title on export but I really didn't find it compelling to break a basic note taking workflow.

I’ve been running this in my homelab since 2021. Can’t live without it now.