I have experienced 32bit 68k to it's limits.
No. You can only have experienced 32bit 68k to 1994 limits and probably not that. Did you experienced x86 32bit limits with a Pentium 1? I think not. The 32bit 68k could use extended memory (like XMS for x86) giving several GB of memory per task, it could have partial memory protection and isolation, it could have multiple cores and threads, it could have much larger caches, it could have an SIMD, it could have a more efficient CPU design and it could have a more efficient ISA and ABI. Good Amiga compatibility is possible (although most new features would require AmigaOS changes) where 64bit pointers of a little endian 64bit processor would give none except UAE. Even x86_64 isn't a particularly good 64bit CISC ISA. I could create a better 64bit 68k like OpenCISC ISA to go with a reinvented Amiga like OS if you want to discard all the baggage (and compatibility) but would it not be a waste of time? There are more risks than money for investment to challenge the oligopolies.
