rM seems to omit backlight as a philosophical idea; if you're mainly interested in similar form-factor of hardware with backlights, https://www.pine64.org/pinenote/ is upcoming. (Firmware/software support's not going to be up to "whatever-Android" or rM quality in a hurry, of course, but it's starting out as a hacking platform anyway.)

Dont know, just i'm supposing it has to be on the roadmap for the next product revision. Otherwise I would be having one.