RISC Fever started in the '80s, and Motorola's 88000 was their initial entry into the race: https://en.wikipedia.org/wiki/Motorola_88000

It wasn't just RISC fever. Motorola ran into substantial problems with getting the performance and cost to acceptable levels even for the 68060. I was an Amiga user at a time, and it was agonising for us to keep waiting for Motorola to close the performance gap that was opening to Intel CPU's. It became very clear that they were falling behind long before they announced there would not be another 680x0 CPU.

Oh you're right. For some reason I thought the line ended with the 68040.

It pretty much might have. The 68060 was way out of the price range of most people, and was in many ways a big disappointment. It delivered increased performance, but too late and at too high cost.