My understanding is that x86 originated from Intel and x86-64 was an extension of it by AMD who had been licensing x86. They agreed to trade so neither paid to license one from the other. So Intel got to use x86-64 because they let AMD have free use of x86. As a result they both keep anyone else from using x86. And of course now a days x86-64 is the only one that really matters. Presumably another company getting involved like Qualcomm would mess up that old deal.

It can make sense for limited uses like cross country trucking (or maybe airlines) where battery will probably never have the range and you live and die by the schedule and refuel stops need to be relatively quick. Refilling semis at a limited number of truck stops with hydrogen stations can be useful if you can also get non petro-derived hydrogen. But for soccer moms and commuters it makes zero sense. Just charge smaller batteries at home and work and have a good interstate charging network for longer trips. We just need to normalize taking breaks on a road trip. It’ll help make more relaxing drives anyway and people already drive angry.