RISC-V rant
From what I'm able to gather, getting reasonable support from major Linux distros for a RISC-V home machine boils down to getting one of the JH7110 boards.
That's about the speed of a Raspberry Pi 3, or about 20% of the speed of my 2011 MacBook Air. The advantage of those RISC-V boards is that they can be had with 8GB of RAM.
Still, that's not high performance by any stretch of the imagination. Speaking of imagination (pun!), it's not clear whether the GPU in JH7110 is supported.