It was simply phased out at some point, like so many other processors. I think it's wrong to say it was "doomed". For one of the minicomputer systems I worked w

It was simply phased out at some point, like so many other processors. I think it's wrong to say it was "doomed". For one of the minicomputer systems I worked with until around 1995 all the interface boards used m68k CPUs and were running their own little operating systems. This made the whole mini quite efficient - all the intelligence in the peripherals meant that a lot of data transfers could be performed independently of the main CPU.