If you want to replace an x86 based machine with a RISC-V based one, you are in for a bad surprize: speed, or, more precisely, the absence if it.

While a good ARM core can already be useful in a PC, the RISC-V is still far behind in performance.

Funny, though, Trump might unintentionally fix this by driving China to use non-X86, non-ARM platforms, and here, RISC-V is the best choice. When the Chinese throw their rather substantial R&D power behind this architecture, it might actually getting somewhere.