Also Apple has used lots of CPU architectures over the years in various devices (e.g. time capsules, various dongles, etc).

Surely they must have RISC V deeply embedded in various locations invisible to the end user, both for cost and experience.

They could possibly even be used deeply in the bowels of the M and A devices doing some random housekeeping in the storage system or who knows what.

In a funny way the term “CPU” is returning to its mainframe roots with so many functional units harnessed into a system, yet at the same time having strayed so far from its original usage (with multicore, non-linear systems) as to have become meaningless.