Rough math on this: $5/gallon diesel with 5mpg = $1/mile fuel cost. 1.7kwh/mile * $0.1/kwh = $0.17/mile. $0.83/mile savings * 400 miles/day * 250 days a year = $83,000/year in fuel savings.
I suspect that charging infrastructure is going to be expensive, but cheap enough that if an operator has multiple trucks, the payback will be pretty fast and the low margins will incentive faster adoption for short haul trucking. Long haul is another beast entirely (don't hold your breath for that industry to come around before well into the 2030s), but short haul should eat this up!