Its mostly the infrasctructure thats the problem though. Its complex, expensive and overall just less efficient than full EV. Ageing wheels has an entertaining vid of the Toyota Mirai where he discusses the pros and cons of hydrogen. https://www.youtube.com/watch?v=rtZQLUtckS4
Just to add to the mutton pool, you also have old female sheeps that are no longer able to give birth.
There's a chap in Cornwall adding value to these old ladies by giving them a bit of a retirement, getting them fit and healthy before slaughtering and dry aging them for some top UK restaurants. Check out The Cornwall Project - Matt Chatfield.
Bit more about it here - https://www.scottgrummett.com/blog/the-cornwall-project.
I am not affiliated, but would like to try it someday.