Too bad 99.9% of the time Windows gets the UI right enough for most users. From what, Win 95? the first time complaints about the UI became mainstream was Windows 8 ("It looks like it's for touch screens!"), and from 8.1 onward those complaints faded back to being mostly from power users. Through all that I can still run a UI application written for Win 2000 and have it work fine.
I'd be fine if I had to deal with one Linux desktop that took a wrong turn for a year or two if it meant that desktop would provide backwards compatibility to the 1990s instead of breaking API compatibility whenever it seems cool.
I'd be fine if I had to deal with one Linux desktop that took a wrong turn for a year or two if it meant that desktop would provide backwards compatibility to the 1990s instead of breaking API compatibility whenever it seems cool.