@mirabilos my post actually reflects my personal experience with using rust on anything that isn't a modern gaming PC (this is something I've posted about before as well), and it's nice to see it finally seriously recognised publicly
for me it's additionally compounded by being an x32 user and (a) LLVM's x32 codegen being famously dogshit and (b) all of "portable" rust code (this usually actually means "we specialcased 6 quads") needing to be painstakingly individually convinced that x32 is distinct from amd64 to the tune of infinite bizarre errors
as for "LLVM outright rejecting even trivial ports on amd64" I don't really see what you mean