Pardon my ignorance on this subject, but is there something inherently better in RISC-V than traditional PICs or other uCs? I have a RISC-V Pinecil and I haven't really figured out what to do with it yet besides the cool factor.
A PIC or ARV etc can really never be a high end machine. And something like a modern 0x86 would really never be low end either. A small aside legacy processor cores on modern CMOS can do fast bit twiddling while consuming trivial amounts of power and die area.
pretty much the same thing one does with any other exotic hardware- install a niche unix variant, then proceed to stare at 'top' and 'show registers' output in the debugger while fantasizing about how cool it is and fixing programs that don't build on it yet :)