C++ interoperability is neither niche nor theoretical. I imagine it would allow them to rewrite bits of the existing compiler, written in C++, into Swift. The

C++ interoperability is neither niche nor theoretical. I imagine it would allow them to rewrite bits of the existing compiler, written in C++, into Swift. The type inference time explosion issue is a known and well-documented flaw. Fixing it would require an overhaul of the type system, which is possible, but I’m not sure if there is appetite for it.