Exactly. Doing all this math when the main estimator says X is exhausting. Obviously I use percentage now but there is a problem with that estimate and a lot of people just want to pretend everything is fine.
Right, make it a toggle in menu - dashboard range estimator: [spec/pessimistic/optimistic].
Include weather, recent trips, lifetime consumption rates, type of road currently driving, etc.
Do anything other than the absolute simplest, laziest, most optimistic estimation which is "hey I bet you'll get the almost impossible-to-meet spec consumption rate!".
