WHY would anybody pay for AmigaDOS as opposed to installing Linux for free?
The only experience worse than Linux on a desktop, is Linux on a laptop.
It's ok for routers etc, although it was certainly better when routers used decent embedded operating systems.
If there was a usb bootable x64 amigaos with built in 68k and ppc backward compatibility and it was able to support all hardware%&$#?@!that I needed then I'd probably chip in some money.
A cheap amiga branded x64 fixed functionality platform that came bundled with amigaos might also be tempting.
I can't see raspberry pi users etc going for it though.