The heaters serve the purpose of keeping the electronics within tested survivable limits.
Electric engines have high torque at low RPMs, which matches nicely with gasoline engines. This is not the case with diesel engines.
From the article
NewYorkCountryLawyer writes: "I find the Firehose software to be infuriating. It seems to have no 'stickiness' but constantly reverts to other views and searches than what I was looking at. I'm about ready to give up on it unless they tell me they recognize it's dumb and are doing something to make it work right. Am I the only one who feels this way?"