As long as the bootloader is unlocked the ROM flashing process isn't really any different from non-Treble devices, at least from the user's perspective. It sho

As long as the bootloader is unlocked the ROM flashing process isn't really any different from non-Treble devices, at least from the user's perspective. It should make developing the ROMs significantly easier. Obviously there are Treble devices whose bootloaders can't be unlocked and third party ROMs are still impossible on those devices. In principle a Generic System Image (GSI) can be flashed onto any Treble device and everything will just work. From what I've seen so far this is not really quite true and there will still need to be device-specific tweaks to ROMs, but the amount of device-specific code should be far lower than before and make life easier for maintainers. Hopefully the end result is more devices with functioning and well maintained ROMs available.