Although they also provide 'gliders' which provide a new chassis for an old engine without pollution controls:
New-looking trucks with old, polluting engines could get a pass from Trump
The heavy truck market is very resistant to change. We should not overstate the rate of adoption for BEV, even when the economics are overwhelming. Obvious, cheap, lifesaving, fuelsaving techniques such as skirts below trailer and truck chassis are strongly resisted in the US.
Years ago there was a DOT program for truck and bus fuel economy. One of my best friends ran the program. I remember that the skirts paid for themselves within a typical two-month use, but operators resisted and refused. My friend gave the analogy of motorcycle riders who resisted using helmets.
Now think about Tesla Semi. To use that drivers much learn how to use touchscreens etc.
Given that today long-haul drivers in the US are increasingly Sikh, there may be a better outlook than before because the new generation is better educated and more adaptable. Large corporate fleets will, as they already are, experimenting. Mass adoption depends on driver acceptance, assuming FSD does not soon arrive in widespread use.
I admit it, there are serious analogies to the F-150 sized market in terms of readiness to change. Even if only 10% accept Semi that will rapidly become a major influence.