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Why does Linux run so well on ARM
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This is overall very true but the transition even for Apple was anything but smooth. There was a long period of time during which app support for ARM was pretty hit or miss. Happily that period is just about over and now everything is built for all archs.
I dunno, overall Rosetta 2 seems to be incredibly successful. It seems like most people were able to transition without worrying too much about whether their software would work at all or not, which I think is undoubtedly the smoothest an architecture transition like this has ever been.
I didn't have much issues running x86 apps on M1, even apps that haven't been updated before then.