Looks like it's made by some fintech people (interestingly most of the top contributors are Russian immigrants) so likely it's not expected to be True Opensource™, but IMO still way better than Notion, which trains its AI on your data whether you want it or not.
I like the graph! It's more functional than one in Obsidian and looks better.
Import from Notion is OK.
They have yet to implement a web clipper for Firefox, so not very usable for me now, cause I'm avoiding anything Chrome-based considering latest Google endeavors. But I'll definitely check it again after some time.
Only for 2/3 of those 1GB to be eaten by Firefox :)