I wanted to like Logseq, but I couldn't stand how opinionated it is about the format of my notes. Also, at least on Ubuntu 22, there was a noticeable delay when interacting with any UI element.

Interesting -- I like the bullets and the 'restrictiveness'

You can achieve a similar effect in Obsidian by using the plugins Outliner and Zoom.

I still feel Logseq is still a better outliner (although I don't use it), Obsidian is better at handling the other use cases.

I use LogSeq with the TODO plugin giving me a sidebar view of outstanding TODOs. It would be wonderful to have a similar plugin for LogSeq but of course the onus is on me to make that happen. If someone were working on such an integration I would gladly support it via Patreon or open collective, etc…

It's confusing. I tried it a few time, but never really got into it. It seems very opinionated into what it offers and seems to force you into a workflow. Obsidian is more liberate and flexible in that regard.