That's just a way to make themselves look good. You should read that with anti-bullshit glasses on: Not supported = It will NEVER work. Partial = Boots a kern

That's just a way to make themselves look good. You should read that with anti-bullshit glasses on: Not supported = It will NEVER work. Partial = Boots a kernel and possibly shows something on the screen, but it's unusable in any relevant way. Supported = It used to barely work at some time, but nobody tested any new version since then.