

It’s still marked as experimental, not deprecated, just will likely stay that way. However, it does work with both protocols individually, and the first-use wizard asks you which dedicated firmware you would like to install:
https://support.nabucasa.com/hc/en-us/articles/26124710072861-Enabling-Thread-support
What? No they can’t, stop spreading bullshit. If that was the case it would be much, much harder to install a different OS. I can tell you from experience though that it’s no harder than any other x86 PC.