I confess I don't understand all the claims about the size of the infrastructure being a major impediment to H2 fuel cells. Obviously, the infrastructure will be limited to start with, but so what, every developing infrastructure suffers from that. But just as with BEVs, you start by building the densest infrastructure where the majority of sales will be, and we know where that is in California - the metropolitan areas of the S.F. Bay Area, L.A., San Diego and Sacramento.
Inevitably there will be a need for some people to travel further than they would like to fuel at the start, but those people will probably hold off buying until there's a station more conveniently located. Or maybe they'll be able to buy a FCHV like the variant of the Highlander that's now available, so that they do their local driving on batteries. Ultimately, in an urban area you want fueling stations no more than 5 miles from anyone, but that will take a while.
Where H2 fuel cells really shine is that with their range, long road trips don't need many stations. Consider what a 300+ mile freeway range with 5 minute refueling gives you. Although I'm not suggesting you would space them that far apart, the almost 800 mile length of I-5 in California can be covered by just two H2 stations, for argument's sake lets say at Lost Hills (Exit 278) and Dunnigan (Exit 556). the former covers I-5 from the Mexican border northwards, the latter the area from Medford, Or. south, and between them they cover the San Joaquin Valley.
More practically, you'd want stations spaced between 1/3rd and 1/2 of the max. range, to allow for out and back trips up to that radius plus some local driving without needing to refuel. Either way, the long range means the number of H2 stations, like the number of gas stations required to provide a basic infrastructure to cover the whole state, is fairly small.
And the fast refueling time gives another benefit. While co-locating 24/7 services like food and bathrooms at the H2 refueling stations is nice to have, it's not essential in the way it is for 30 minute or more QCs. You can go elsewhere for those services as you're not tied to that location for a prolonged period of time, so unmanned stations can be used which are available 24/7.
An example of this might be to put an H2 electrolysis fueling station at Moccasin on Highway 120 on the way to Yosemite, at the base of Priest Grade (Old and New). There's absolutely nothing at Moccasin except a hydroelectric power station, which is part of San Francisco's Hetch Hetchy water and power system. But ten minutes east is the town of Groveland, where food and other services are available.
Someone posted that they think that BEV ranges will have improved to fuel cell range in the next few years at a lower price. Certainly that's a possibility but by no means a certainty, and the competition between them will improve both types.
I've got no preference for which ultimately wins, but it's far too early to say which will prove superior. Or perhaps each will find their own niche(s), or FCHVs will rule.
As for home hydrogen production, well, we're a long ways from that making any financial or energy sense, and the safety issues will probably dominate in any case. For commercial production I expect that the majority of H2 in this dem/val stage will come from methane, but I know that at least one of the planned H2 stations will use PV or wind-powered electrolysis, which will ultimately be required. I can live with the use of methane for now, as long as we keep it small scale.
I expect it will be fairly small scale, because companies don't want to sink a lot of capital into production installations that may be obsolete in just a few years. For example, compression to 5-10,000 PSI takes something like 15-20% of the energy embodied in the H2, and if low-pressure metal hydride or nanotube storage becomes commercial in a few years, those expensive (and energy-intensive) compressors will only be worth their scrap-value, unless they can be re-purposed.
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].
The 'best' is the enemy of 'good enough'. Copper shot, not Silver bullets.