For 50 yrs people have talked about what’s about to happen.
Ask some guys at truck stops who of them is using anything other than diesel fuel to move food interstate.
It won't be "some guys at truck stops" who will be the first users, it will be rail and corporate long-haul truck fleets, and possibly some large urban fleets (transit buses, schoolbuses). This is a great deal more than "people talking about what's about to happen". Money is already being spent to "make it happen".