They are using risc-v for their 64-bit cores now.
Re:MIPS Becomes RISC-V
by pwdisswordfish0 on Tuesday March 09, 2021 @07:07AM
(#26398037)
The context was not "Who isn't using RISC-V?" It was whether anyone is using SPARC. The reality: they're not mutually exclusive. They offer both, contrary to the implied subtext of your comment that there has been a transition from SPARC to RISC-V.
https://www.gaisler.com/index.php/products/components/gr740