I agree, FPGA is cheap enough and fast enough for m68k AmigaOS. Matthey, I understand your concerns, and I'm sure your points will materialize themselves when/if no compilers supports the changes/improvements that Gunnar has done. In the meantime, I dont think anyone/anything prevents someone else, for example you, from doing a more "conservative" m68k core for the Vampire boards.
But yeah, a m68k cherry pi would be awesome, I would guaranteed buy a few, especially if the m68k has MMU and can run Linux, I want real hardware for my Linux/m68k again

My suggestion is to ignore what Gunnar is doing and join forces with other more likeminded people and "do it right", the best solution will win, right?