It’s hard to balance. I used to work on an open source project with UI that grew organically with added features, with no plan. At some point it was just a disorganised mess of things added on top of other things.

So we remade the UI from scratch and the result, I think, was much better, intuitive, and approachable to new users. But of course some existing users were unhappy, because however bad the existing UI was, it was one they were already used to.