> While I find some money, and provide access to a machine, there just aren't enough dollars to support bringing Rust and LLVM to Alpha or HPPA. It just isn't a thing that can happen.

The Motorola 68k architecture is apparently getting included in LLVM (albeit as an 'experimental', unsupported backend) so it seems that this could be an option. Another option is to support Rust via cranelift.