I presently use an Emtb for trails and serious climbs (1,000m+) My touring bike is still normal, but I know one day, if I want to continue touring, I may need assistance. The way tech is moving on ebikes, it will not be long before one can go 150km on a single charge and a full charge in under an hour. The Emtb needs the most powerful motor available and the largest battery, but a tourer/road riding can get away with a smaller motor. Presently, Bosch has a a 750 wh battery that can easily tackle a full day road ride, coupled with their 6A charger (optional) a full charge in 2 hours.
Wild camping is out of the question because even with solar panels and such, it would take several days to get a half charge. A spare battery is worth considering, but expensive. No air travel as the batteries are banned.
My belief is, if one needs some help to keep riding, go for it.
Do not go gently into that good night!