Still no thunderbolt support.
Not quite there yet though. No PCI or DisplayPort (latter is working but unstable). But at least they seem to be on it.
b) it's useful in a comment thread like this so people can quickly see what the 'caveats' mentioned in the title of the post are
Why are you demanding a user does that for free instead of the big corp that made the platform?
But Intel and AMD post documents to explain how to use their hardware. Apple doesn’t. So it’s not an equivalent effort by any stretch.