I wish every ARM device supported UEFI. Custom images for ever singly ARM device is not sustainable. Only Microsoft required UEFI on ARM devices (and maybe Apple now with their own silicon?) but they locked all those bootloaders. Even when people found ways past those locks, there are no open source drivers for all the hardware on Lumia phones, so they're all useless e-waste bricks now.
Afaik, UEFI (at least on ARM hardware I worked with) embeds the DeviceTree for non-ACPI boot usecases, so the user is no longer responsible for providing the proper DTB for that board, although the user can still override it if needed.
Last time I worked with ARMv8, UEFI provided both ACPI tables and the embedded DTB, since ACPI support was undergoing a major rewrite in the kernel at that time.
DeviceTree can go die in a fire.