>OpenSPARC had some success, being used for space by ESA for example. ESA's OpenSPARC-based LEON. But note ESA has already decided to replace it with the RISC-

>OpenSPARC had some success, being used for space by ESA for example. ESA's OpenSPARC-based LEON. But note ESA has already decided to replace it with the RISC-V based NOEL.