BTW, there are also other interesting, low-power RISC architectures that are used in millions of devices, but most people have never heard of them. For example:
* SuperH [0], 32bit only, now basically dead, but microcontrollers are still available
* AVR32 [1], 32 bit only, also quite dead
* ARC [2], 32/64bit, still quite popular in an automotive
[1]: https://en.wikipedia.org/wiki/AVR32
[2]: <https://en.wikipedia.org/wiki/ARC_(processor)>