....but it still makes no sense if you want to create a market again for amiga software.
What I think most people miss, is that it would take a massive coordinated investment for an alternative OS to gain any kind of market these days. A modern example would be ChromeOS. Even with Google's large pot of gold behind it (and a forward thinking radical concept), it's only just starting to gain some market share. Another example is Windows, MS is having to sink $$$ into it just to try and stop the bleeding.
If AmigaOS/MorphOS were ported to x86 and given away free as an new year's gift they would still remain an extremely niche hobby OS.
Everything is going cloud-based and controlled via touch screens (or something even more radical), the OS itself is moving to the background with the Apps taking center stage.