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This. Windows was much more open and created a massive parallel industry of third party software, at all levels of the stack.

Apple doesn't even let Firefox port their browser. Windows had third-party C compilers.

Of course Apple also has Mac OS that is on par with Windows when it comes to not being a total walled garden.

And Microsoft also has Windows RT with restrictions that makes it a walled garden just like iOS.

So in the end, it all evens out between the two.