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I'm not sure I understand what Apple contributed here. It's not supported, helped, or encouraged by Apple. And Apple does not document their H/W in ways that allow reuse. Hence these are all reverse engineering projects. Apple _is_ a walled garden ecosystem. That has many obvious advantages, things just work, etc. Personally I happen to not like it, but it's a choice folks have to make by themselves. I buy my H/W fro…
I guess we could fairly call it a undocumented or obscure garden? But there's no real designed wall there. Apple aren't preventing anything, they're just not helping us out either. Agree it would be nice for them to help out a little, but it's really not the same thing.
It's the same thing. (And the only reason they aren't yet outright preventing it is because it would be bad PR - nobody wants their desktop computer to be like the iPhone or iPad. But it will happen.)