And it always will be, because "users" is plural. It is not a defect in the design of the desktop or whatever has "too many" alternatives. The mistake would be to think that "one-desktop-fits-all".
Also, the only good reason to change things is to fix problems. Nobody's really asking for "moar modernity". Starting from design theories is plain wrong. Ask users about their problems first, and the use your design knowledge to analyse and fix them.
> Strategy is another part of UX; understanding who the target user is, and determining what they want. Deciding what is important, and what is not; what will the development team prioritize and what will it ignore? "The fastest way a UX designer can save your team time is to help you say no."
He is not talking about users but customers.
That's how FOSS works: some users find it annoying to have to place and resize their windows manually, so some of them made "tiling window managers". Many Linux DEs also had virtual desktops a million years before Windows because FOSS is made by users, for users.