Storing propane as a low-pressure gas is no more difficult than propane (and, in fact, old propane tanks work just fine with hydrogen). Yes, hydrogen's flame is invisible..a disadvantage. But, hydrogen is very much lighter than air, so tends to disperse much more rapidly than propane (or gasoline fumes). But the technology exists for safe use of either. There is nothing "exotic" about hydrogen storage. Millions of pounds of hydrogen are stored and used in myriad different size scales on a daily basis, from lecture bottle size tanks up to tank-truck size tank assemblies, in hundreds (if not thousands) of locations around the US.
I didn’t suggest “exotic” just more difficult which translates into more expensive if any quantity is going to be stored.
Yes, at LOW pressure, hence low volume, amounts, no problem but when you talk about the many facilities storing the gas you don’t mention the pressures involved nor the cost of compressing and storing at high pressures.
And at higher pressures hydrogen is virtually impossible to seal in as it will penetrate many metals.
Storing at home is not something I would want to do so perhaps immediate consumption by a fuel cell might be feasible but still storing gaseous hydrogen and liquid propane are very animals particularly if we’re talking about doing so at home.