Let's consider hydrogen cars are the next big thing. Is it a good move to go massively towards electric cars? Especially regarding batteries that will have to be massively replaced in 2 years?
Batteries last longer than that.
Hydrogen has problems, hydrogen embrittlement, its extremely hard to contain.
Additionally hydrogen's major strength, that it continues the current fill up at a filling station dynamic* means that it needs to start making gains now, while there are still petrol stations left, to make the switch to hydrogen.
Hydrogen may well 'win' but I don't think its an open and shut case.
*yes you can generate hydrogen at home. In that situation you basically you have the same tradeoffs as a standard battery