1) There are a lot of bugs, for starters. I've been using it for many months but had to switch back to Chrome about a year ago due to some unbearable bugs like tabs freezing and sync kept bringing back long-gone tabs. Don't get me wrong, I've reported a dozen issues (I have 50+ started threads on orionfeedback forums), but anyway, I felt like I spent more time reporting bugs than actually doing my stuff.
2) Some needed extensions are broken. It's not like I need that many with weird APIs. Bitwarden has been broken for some time, and Grammarly is still broken (3 years in).
I tried the latest version a few days ago given what's happening with chrome rn, there are some annoyances still. I like Orion (kudos to Kagi team for working on it) and want it to succeed, I believe it just needs more time, I guess.
Fair enough. I've never used Bitwarden or Grammarly. I used to have a lot of crashes, but they've improved in the last 6 months and I never had tabs freezing or ghost tabs, and I always have 300+ tabs open. Maybe our different use styles lead to different outcomes!