There are lots of cases where you want more. For example Google's secure boot for Pixel uses the Titan M security chip, which is a RISC-V architecture. Still,

There are lots of cases where you want more. For example Google's secure boot for Pixel uses the Titan M security chip, which is a RISC-V architecture. Still, looking at https://llvm.org/docs/CompilerWriterInfo.html https://llvm.org/docs/CompilerWriterInfo.html, it is hard to find an architecture that Clang won't support that is relevant to many people. And if someone does find one, well, Clang is open source and open to adding more architectures.