@jarkko @lupyuen It's a dual core 64 bit RISC-V MCU that is surprisingly powerful for what it is. It's also a pain to deal with.
Perhaps Maix is the best way to get into one. I have the Stick V version and the Stamp I think it is called.
In terms of power, I think an NES Emulator was written for it. I believe the RV64GC is an older version than what was standardized on. It's weird and was my first experience with RISC V.