I heard of that but didn't look into it at all because I have more important things to do, like playing Minetest, and researching ThinkPads.

By the way, check out the list of laptops Libreboot supports:
https://libreboot.org/docs/hardware/#laptops-intel-x86

More models are supported now. I know you hoard them a bit, so time to buy before people find out! And the W541 is mentioned in the latest release too ( https://libreboot.org/news/libreboot20221214.html ), even though it's not there. So, apparently now you can Libreboot ThinkPads with i7s, and the T440p supports 16 GB of RAM, and the W541 supports 32 GB. Also, the X220 and X230 are now supported.

Not a whole lot of information out yet, though. Seems like nobody knows. Sshhh, it's a secret.