It's exactly because of licencing that the situation with RISC-V is a world of proprietary SoCs with no consistency, as opposed to the open system that is an x86 PC. (That the ISA is or isn't open is trifling and matters to neither user nor kernel developer.) Essentially every single board requires its very own custom port of your preferred OS.

I will wait for x86's doom, but it will take patience. After all, people have been saying it's dying and will be replaced by some RISC alternative for over 30 years now.