

That’s not really true. Yes avoiding complex instructions makes the front end easier to pipeline but there are lots of smarts in the backend to do prediction and scheduling to keep the execution units fed. The ISA might be free to use but no one is sharing their highly optimised server silicon architecture designs.
RISC-V’s challenge is can they standardise the software ecosystem enough that things just work across a multitude of chip providers or does everything devolve into specialist distributions taking advantage of each manufacturers “special sauce” custom instructions.
Gaining design wins over Arm’s microcontrollers for bespoke hardware was the easy bit. Replacing stuff in the server space is much harder and something that took Arm decades to make inroads into.
Android gets a leg up from being built on a FLOSS base but I don’t think it was the community that pushed Android to where it is today. That’s taken a lot of money and resources from Google and it’s phone partners investing in the slightly more open platform than Apple.