Because batteries last hella long and it's not a particular concern. Nobody's going to be ad-hoc adding or removing batteries in the floor of the vehicle when a

Because batteries last hella long and it's not a particular concern. Nobody's going to be ad-hoc adding or removing batteries in the floor of the vehicle when a longer trip comes up. Besides, the technology is seeing rapid iteration of cooling systems and integration with the rest of the vehicle (like structural battery packs). This is not the time for such standards.