In my outsider's opinion, the Amiga community should have implemented this much sooner and moved on from AmigaOS to the combination of the Linux kernel and the AmigaOS userland ported on top of it, instead of patching a kernel that wasn't designed for MMUs. This and cheaper x86-based hardware could have kept the Amiga relevant as a (relatively) mainstream platform instead of a diehard retrocomputing island. I don't know if this was being discussed back in the day, hindsight is 20/20 of course.