Lithium is a conflict resource. its scarce, its hard to mine, and as a result so far electric cars are a fanciful plaything for what i would consider "the rich." This paves the way for electric cars that a working class mom and dad can afford to get to and from work and the store. and of course electric trucks that have obscene amounts of torque means never "getting stuck" behind a slow truck ever again. it also means cleaner cities and hopefully cheaper trucking for over the road drivers and owner/operators.
Ive told my coworkers and apprentices this for as long as i can remember: expect to service elecric long-haul trucks in your lifetime. Learn the powertrain, the dynamics, the performance characteristics and keep pace with the technology as it evolves. Make it part of your expectation in the future, because the economic model of diesel is a last-ditch effort at best in the 21st century.