Actually... while I recall OS4 finally grew some UAE-type support [or just UAE?] to allow the use of particularly chipset-banging apps...
...hasn't there been some demand for the proverbial "chipset on a card" to support legacy apps with the software and [when the final MAI AmigaOnes were in production] hardware that exists right now?
If, say, this type of functionality was built into a Catweasel, you'd get your legacy floppy support, analog graphics and sound, and/or you could just plop a full Minimig (or equivalent) on a card with a readable framebuffer* and use that for your legacy compatibility on whatever platform you like.
It's easy to forget that the lack of the oft-promised Amiga-on-a-card (or classic chipset availability in general) was what complicated and held up all the previous NG hardware projects. Of course, these days it's hard enough to find anyone who can even get a plain reference board into production, but this could finally make what we were supposed to see about 7 years ago possible.
