"The first fuel cells were invented by Sir William Grove in 1838. The first commercial use of fuel cells came more than a century later following the invention of the hydrogen–oxygen fuel cell by Francis Thomas Bacon in 1932". And they are only starting to get market penetration what the few years decade.

The same can be said about electric cars.

Timeline
1891 William Morrison from Des Moines, Iowa develops a six-passenger electric wagon that is often considered the first practical electric vehicle in the United States.
1892-1896 Electric cars become increasingly popular.
1897 First 12 electric cabs operate in New York City.
1897-1913 Electric cars compete with gasoline-powered cars.
1914-1935 Sales of electric cars decline with the eventual disappearance of the cars from the market, fully replaced by gasoline-powered competitors.
1973 Enfield 8000 did make it into small-scale production, 112 were eventually produced.
1998 first mass produced cars by GM
2008 tesla
2020 in March Tesla made it first million cars

And you are worried about a mere 3 years.

As far as the non-glass solar panel a great honest up date by the company that some can not accept.

"The Company has started work developing a business plan for expanding on either manufacturing or licensing of the technology in 2020 but given capital limitations continues this development in 2022."