You don't lose freedom by switching fuel. Emphatically so when you didn't get a say in the old fuel either, and even more emphatically when the new one is cheaper overall than the old.

Cheaper how? Don’t you need a battery change at a certain mileage or age of the vehicle that will eliminate any cost advantage of not using diesel? At least for cars it does. It may be better for trucks considering they do put in a lot of mileage

Assuming the batteries need total replacement every six hundred cycles[0] and the cost of new batteries is $75k[1], that's $0.25/mile; plus charging costs which is claimed to be 2kWh/mile, and that is going to vary a lot depending on when and where you are but the average I generally see for the USA is $0.10/kWh for domestic and $0.07 for industrial supply (and for a semi I think industrial is the relevant number), which means $0.14/mile; the total is therefore $0.39/mile.

A quick google (because I'm not a trucker) suggests the gross fuel expenses of a truck are $0.40-$0.55/mile.

Thus electric is cheaper, with the usual caveats for extrapolation from the sales blurb from a single model vs. the empirical observations of the actually existing alternative. As none of the voluminous criticism I've seen and read of Tesla is about the fuel efficiency being over-optimistic, I'm willing to believe them on this.

[0] the worst claim I found with a quick google was 50% capacity at 600, the best claim was a factor of ten better; the servicing probably isn't going to be free, but a 50% capacity battery is still useful for fixed installations so I'm going to assume that's a wash.

[1] 500 mile range model $180k, 300 mile range model $150k, so extra 200 miles cost $30k, so 500 mile peak capacity costs $30k/200*500 = $75k