It would be naive to think there aren't new bugs or changes in behavior introduced in 1.4.
But yes, of course there will be new bugs. But that's why 1.4.x for x > 0 is interesting. If the branch is being used and people are not reporting _more_ bugs, and the bugs you care about it are being fixed (successfully) on it, and it passes your tests, etc., ... I dunno. This is an application domain where you can do some pretty solid testing of it, comparative fuzzing, etc., so it doesn't strike me as entirely mad to jump over after a few minor releases where you can see the bug trajectory.
Anthropic is not exactly the hallmark of engineering excellence... quite the contrary.
> But yes, of course there will be new bugs
Obviously, which is why more thought should have been put into the transition.
Not everyone will want to yolo their production projects into such a massive rewrite overnight.