I suspect you are someone who can't separate x86 (ic 64bit) and Microsoft Windows computer.
No, personally I mostly use X86 nowadays with linux (my ARM-equipped phone being on secondary place), although that would be Atom in most of the cases, as I don't really need that much CPU power for "most things", and it definitely makes sense for any "always on" system (Yes, I know ARM could save even more on the electricity bill). PowerPC (with MorphOS) comes as third, sometimes when you have to spend entire day fighting with certain system, you might want to use something different at home :hammer:
Basically I just find it funny how someone considers PowerPC's "90's design" to be a bad thing, as the CPU it's most often (f.ex. in this thread) compared to, is based on 1978's design. Unlike in many other areas, in CPU design, I'd say "newer == better". Of course that won't automatically make it fast, popular or good choice (usually due to lack of previous point)
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And as for Microsoft windows, I know that earlier NT versions (3, was it?) supported several processors, including PowerPC. Current (desktop) Windows only runs on X86 / X86-64, but next version will add ARM support. Windows Mobile / Phone of course runs on other hardware, but that's almost totally different story.
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And where "official" Windows doesn't run, wine will run windows binaries compiled for the platform it's running on. Which is quite useless, as even if a program is 100% open source, if it depends on some (X86-only, as most) library which isn't, no chance running it. Of course wine itself provides own versions of some "Windows internals".