> U-Boot upstream itself is staunchly anti-AI, at least at the time of this release, and much discussion of the above was had on their mailing list.

I saw this as well, which is funny because I've sent plenty of patches written using AI assistance to upstream U-Boot. It was my understanding that U-Boot was mostly following kernel conventions in general as many U-Boot drivers share code(in addition to the actual subsystem maintainers themselves) with their kernel equivalents.