Tesla delivers there first semi

I learned yesterday that Tesla is getting a lot of press for Pepsi receiving these Tesla Semi's. However, they already have a couple dozen EV Trucks from Paccar, which is Kenworth and Peterbilt. So, this is not their first or will it be the last EV trucks they purchase and put to use.

In addition, Paccar mentioned they are working on hydrogen fueled and hydrogen hybrid trucks and engines. Much like BMW, Toyota and others. So, the big question, what alternative fuel vehicles will become main stream in the long run.