Perhaps in Silverblue or other systems not designed to be a general
purpose operating system?
What, where did you get that? Silverblue is general purpose.
Anyways, my 2c on this topic: Once WebAssembly supports threads (it's coming)
there's going to be a lot of interesting discussion about potentially using it in
places where we compile native code in the operating system and applications today.
IOW, it doesn't make sense to invest much in LLVM IR versus WebAssembly.