A few videos have appeared on YouTube in the last few days about this VisionFive board. Instead of an ARM chip, it uses a RISC-V CPU, but of course it runs Linux. It’s quite clearly gunning for the Raspberry π market, both in its configuration and pricewise, though I don’t think it’s as powerful as a π 4. StarFive Technology have a few quite technical-looking videos on their channel, seemingly going into details like how the OS boots. I’ll see if I can find a decent hands-on review.