MIPS seems to be quite widely supported (about as much as PPC64LE) despite that I’m not able to find anything that uses MIPSLE/MIPS64LE. Are they only supported for QEMU or is there anything that still uses it? Do you know of anything to play around with Linux for MIPSLE/MIPS64LE that isn’t emulation?
MIPS is special purpose, unlike something like ARM. You’ll find them a lot in carrier-grade comms equipment, electrical, mechanical…etc. They aren’t meant for general consumption.