Yeah, the requirement to build and provide device trees for most mobile devices is the huge issue. For all of the garbage we have gotten from buggy ass ACPI tables on assorted PC’s, it’s absolutely true that it solved a lot of headaches with hardware discovery/enumeration.

It’s really too bad that ARM had adopted ACPI as part of their SystemReady certification. It does work, and not reinventing the wheel is always a wise where feasible, but I think we could absolutely push something better.