Could some cross assembler toolchains with QEMU user space emulation be added? At least ARM and AArch64 as those are the two most common non-x86 architectures, but MIPS, PPC(64LE), and RISC-V would be nice to have if they are available in the repos. If they are added to binfmt_misc, they can also transparently be used with the raw ELF interpreter. I would find that very helpful, as there are no places I can show off my ARM golfing.