RISC-V is a royalty-free open ISA, and there are billions of RISC-V cores now existing in the world. The vast majority of them are microcontrollers with a few kb of RAM used by companies that nead control electronics for computer hardware, cameras and such. Last year SiFive released the worlds first RISC-V computer that can run Linux, and I was sure that this field would develop further. However, it appears to have died, I have heard of only new designs (on paper) of future cores, no new implementations.
Now IBM's Power ISA is also open and royalty-free. But the Talos board is also now certified by the FSF as entirely free of closed-source software. It can be used with Debian on open source firmware. The only thing is the price, because mainboard alone costs as much as the SiFive board, which has integrated RAM and everything else needed to run. However, here you have a computer that you could buy once and use for the rest of your life, no vendor-lock in and planned obsolecence, on difficulties in repurposing as everything can be changedand tweaked by the user. I wonder if anyone of you guys have one?
https://www.fsf.org/news/talos-ii-mainb ... ur-freedom