> But of course, given the enormous anti-hydrogen campaign of the last decade, everything is currently at an immature level.

You cannot go from zero to 100% instantly. There needs to be a period of scaling up, which has not been granted yet. This will come down in price drastically in the future. The main advantage is the lack of raw materials needed compared to a battery solution, only needing some tanks plus some electrical equipment not much bigger than what home solar people deal with.