I went to considerable trouble to evaluate and obtain a small stockpile of some well-supported Coreboot-friendly hardware, while it was still easily available on the used market. (For example, in the past, old ThinkPad models tended to dry up, as the used pipeline emptied of corporate fleet e-cyclers.)

I'm thrilled to see more new and old boards possibly being well-supported by Coreboot, though I'm not assuming that's going to be a thing.

https://www.neilvandyke.org/coreboot/