It makes zero sense to buld 10,000 x86/ARM motherboards when they are available off the shelves.
1. Port OS4 to a readily available motherboard. You will have a few thousands of possible Amiga OS4 buyers.
2. Being x86, it will be way easier to port open source software to OS4 and it will run faster.
3. Everybody wins.
Now if the future of the Amiga OS is an underspecced, ridiculously expensive computer with an obvious lack of decent software...
PS. Sorry for being blunt, not my intention to offend anyone here...