The U.S. is so, so far behind so many other countries, and the next four years are just going to put us further behind.

We really shouldn't have allowed the fossil fuel industry to put our energy independence and security in the hands of every other country out there.

What are the drawbacks I am too uneducated to see?

Unnecessarily complex and certainly expensive. Wasteful of energy - charging a battery is vastly more efficient use of the electricity than splitting water by electrolysis then recombining the the hydrogen with oxygen to make electricity. Hydrogen does store a lot of energy per gram, but as a gas isn't very dense, so energy per unit volume is likely low compared to a battery, and storing it at high pressure to increase the volumetric energy density can make for a heavy container. Another article (that seems to have a reasonable summary of pros and cons) shows a 600 g weight savings (2.4 kg for the cylinder vs. a 3 kg) compared to a battery with comparable energy storage, but that comparison leaves out the lower efficiency of fuel cells compared to batteries in delivering electricity from that stored energy, so overall you'll get more range per unit weight from a battery than this hydrogen tank.

It's also likely very expensive - to the point that it appears they are not selling these to individuals. Fuel cell technology isn't cheap.

My solar panels. No need for hydrogen. What’s crazy is both this one and my fully analog bike run by using your legs and pedaling! And as an added bonus, you actually get exercise and strengthen your heart, lungs and muscles!

if they explode like all these new fancy Chinese batteries do that are in all the e-cigs and fancy kids' scooters and what-not. Seems like Chinese QA is... lacking, generally speaking.

and three articles about hydrogen powered vehicles. Now i'm confused