The argument is an ancient one, going back to before Hyperion even wrote a line of code. All sorts of reasons have been given (economic, licensing, technical etc.) but the simple truth is that the will never existed and probably never will.
Which is why this has been a static market/scene for the best part of a decade now. Yes, there's the odd development here and there but no scope for expansion or attracting new users or old users who moved away years ago.
I was hoping to see something happen many years ago, but gave up when it became clear it wasn't going to happen. Now - with the exception of taking the odd brief look at AROS development about once a year - I haven't run any Amiga software for over five years. It would take something utterly astonishing to bring me back and let's face it that ain't on the cards either.
The boat left the jetty a long time ago.