Are they though? Except for Windows everything else has become a UNIX (even on game consoles, Xbox runs a Windows derivate and PlayStation runs on a BSD kernel, only Nintendo is still doing their own thing).
The OS diversity in the 90s was much bigger than today, AmigaOS, RiscOS, AtariTOS, BeOS and the original MacOS were all siginificantly different from each other, much more different than Linux vs macOS vs Android vs iOS.
Doesn't the dramatic decrease in diversity and the general streamlining/convergence of the remaining options also qualify as being "extremely different" when compared to the 90s?
Are they though? Except for Windows everything else has become a UNIX (even on game consoles, Xbox runs a Windows derivate and PlayStation runs on a BSD kernel, only Nintendo is still doing their own thing).
The OS diversity in the 90s was much bigger than today, AmigaOS, RiscOS, AtariTOS, BeOS and the original MacOS were all siginificantly different from each other, much more different than Linux vs macOS vs Android vs iOS.