I drove 1800 miles in a Hydrogen Car

Regarding safety, hydrogen is super reactive (insert Hindenburg gif here) and while I'm sure they have done loads of tests on the COPVs (composite overwrapped pressure vessels) the use of cryogenic hydrogen as a fuel in the use case of a day in day out vehicle isn't a mode which these items has seen before in any other application. 

COPVs in a lab environment for example wouldn't ever be expected to endure the stresses of impacts/collisions a vehicle may endure and COPVs used in aerospace for rockets which may have higher impact/stress/load ratings aren't designed to be used continuously or go through hundreds/thousands of pressurization/depressurization cycles like a car fuel tank would be expected to experience.

In the crash tests which verified the integrity of the hydrogen tanks, were they done with the hydrogen tanks full ? half full ? nearly empty ? I'm not sure about COPVs but traditional rocket fuel tanks owe a LOT of their strength to being pressurized (an extreme example being some early rockets being so weak while the fuel tanks were empty they wouldn't support their own weight).

While there's might be someone somewhere who has such a unique set of circumstances that hydrogen makes the most sense for them to power their car, it's undeniable that overwhelmingly for most people in most parts of the world a BEV or PHEV makes far more sense.