In the case of digital cameras, the driving forces were varied, from governments wanting better means to spy and drop bombs, the film industry looking for a replacement tech, dedicated hobbyists seeing the benefits and getting on board. I can think of two parallels in electric vehicles, namely high performance applications which love the insane torque, low center of gravity, and diminished complexity compared to something like a twin-charged ICE. The other is long haul trucking, which would love to stop paying for diesel. In the former case its still incredibly expensive and often matched with an ICE, and the latter requires much more range and a lower price per unit.

Hopefully you’re right, and those driving forces will parallel the adoption of digital cameras. If so however, it’s going to be gradual barring some kind of miracle breakthrough battery tech.