I have good news: Libreboot just got a big update. Not yet a new release, but Libreboot's build system now uses the latest coreboot revision on most boards; GRUB and SeaBIOS payloads have also been updated to newer revisions.

It is announced here:
libreboot.org/news/update20230

I would ask all those interested to provide testing, based on this. Information is given, on the announcement.

There *will* be two more Libreboot releases, this year - possibly three. I'm starting a massive push, as of today.