Hydrogen, in 2016, is a non-starter. First you can't just 'get' it. We're quickly getting an EV grid and the Natural Gas 'grid' is already there.
Not sure what you mean here. We are "quickly getting an EV grid", but somehow "quickly getting a hydrogen grid" is such a huge problem? If Tesla can pull off the EV grid, then who's to say Nikola (or some other company, for that matter) can't do the same with hydrogen?
There's also the possibility for these trucks to be plug-in hybrids. They're not talking about it, but adding support for an external charge supply would be more or less trivial.