Why don't hydrogen fuel cells for a home get more air time by greenfags?

Downsides
>bulky
>heavy

Upsides
>no degradation, lasts pretty much forever
>infinitely scalable
>charge EVs whenever without slamming the grid

These things in every home could easily allow the grid to run on renewables, plus the added benefit of everyone having electrical storage in a disaster without having to thing about it.

I am starting to think environmentalists goals have nothing to do with the environment.