I have little experience with Linux desktop environments, I use it for servers through the command line only, but the little interaction I had seemed more of an attempt to mimic Windows, so it’s no surprise it behaves similarly.

Most web and mobile developers I know use Macs, by far. Windows development is targeted to enterprise custom software, in my experience. It pays handsomely, but no one seems crazy in love with the stack.

I don’t think Apple has to cater to users of other platforms specially when it considers its conventions superior.

Regarding bépo layout, dvorak is already a tiny niche. Bépo is a niche within a niche. I wouldn’t expect wide support anywhere really.