Good example because Liquid Glass is obviously preparing for the next paradigm shift in computing which will actually require/open up a lot of innovation on the UI front again.

Apple has the unfortunate burden of needing to shepherd millions of developers over to this new paradigm (AR) before it really exists, and so is shoving Liquid Glass onto devices that don't really benefit from it.

But in practice people are generally not happy about lots of new experimentation going on. By definition, most of the results suck. In retrospect we get to stand in awe of those that survived the evolutionary battle and say "wow browser tabs" and "wow pull to refresh" and forget the millions of other bad ideas that we tried.