Have we seen a commercially available high performance 64-bit RISCV chip at production scale yet?

There’s a lot of work and experience built up for ARM through Proton and other tech (that can be reverse engineered to see how it works) like Rosetta. A lot of that would have to be redone for RISCV. Seems like a lot of risk in the short term for what’s not an obvious product benefit.

I would expect the high-end RISCV market to mature before a company like Valve dives in.