I'm sure Fastlane69 can comment on this himself, but he said earlier that his project didn't actually fail.

I think that most of the technical points he made are very legit.

Also, and how ever minor this is, eventhough everything may be possible, this would still be different from being capable of doing/supporting something.

Being 'capable' sort of suggests the functions/features will work 'out-of-the-box' without using too much workarounds (you'll probably run into using workarounds with every engine though).