Specifically the Surface Book does a really good job of making the windows "experience" work in a keyboardless scenario. I'm sure the same is true of the other convertable hardware that's been popping up lately.
I'll concede that this isn't the majority of users but I would argue it's not just a rewrapping of existing software.
It's very apparent to me, it puts itself back in tablet mode after every restart, it's a pain to get that slide out menu working with a mouse. I bet a lot of people unknowingly get stuck in it.
OSX/macOS promoted their point releases to be something between service packs and major version releases, keeping it at version "X" for marketing purposes. From what I can see, between Cheetah and Sierra the expected workflow of the system has changed strongly a few times.
I don't recall them saying that.
When you have no real, defined product that solves specific problems to sell anymore, you sell garbage that pretends to be a real product. Microsoft is far from alone here. Almost every successful software product that doesn't know when to stop building and start maintaining suffers from this degradation later on in life.