You say “go back” but that was never more than a niche thing. For better or worse, Google’s Android has pretty much always been the chief representative of mobile Linux. And far from being a waste of time, Android is the most widely distributed mobile operating system on the planet.
>>owebma+Yd
Firefox OS lived a short and obscure life years after Android entered the market and certainly wasn’t a GNU or Debian-like distribution of Linux.