I think it's extremely telling that you keep issuing sladerous ad-hominem instead of speaking on the facts, such as the advantages of hydrogen. The people who are criticizing H cite important things to consider and construct cogent arguments whereas you speak of (as far as I can tell) completely unjustified expectations for these problems to be ameliorated. Why don't you speak on the potential advantage of a hydrogen future?
how many car manufacturers
Is effort by a company a good indicator of the potential of future technology? If so, why are there so many companies pushing against moving past fossil fuels?