After reading this whole thread.
AmigaOS 4 for 68k is pointless because 68k is too slow.
Fastest avaible real 68k cpu has 486 level performance.
AROS 68k developers try to do it, they failded AROS 68k is too slow on real 68k.
Yes, many years ago gunnar von boehn promise that his wonderfull natami/apollo outrun powerpc processors but after many years of lies and false promises, fastest avaible 68k 68060 is still slower than first pentium, and hundred times slower than powerpc processors.
68k users have to accept that making software for real 68k has no sense because because 68k is too slow.