There is no doubt that @tyre's points about a "reset" being part of the reason folks like new issue trackers.
But setting aside the "reset" we got (our backlog from other tools wasn't _that_ big), we really enjoyed the speed and accessibility (ex: desktop app, keyboard shortcuts, etc).
I recommend folks give it a try.
My only feedback to the Linear team is: I get notifications for the desktop app to upgrade too often. I love rapid iteration, but it feels like it's daily.
Because I get it so often, it's caused me to start to not pay attention to the "red dot", which my brain has convinced itself is "update ready" and not "unread items in inbox", which it really is.
Hopefully you can find a happy balance or some other UX tricks to help me out here. Thanks!