I take you back to the period 1870 to 1930, yes 30 years, and petrol/diesel garages weren't exactly widely available back then.... the two wild cards for the proliferation/expansion of the network was finding out how to handle petrol (mogas) cuts coming out of lighter crudes and how to safely and effectively blend them (this in California/Texas and Pennsylvania) and the impact that Henry Ford had on making the car affordable - and yes it took 60+ years as it was in 1876, Nicolaus Otto, working with Gottlieb Daimler and Wilhelm Maybach, patented the compressed charge, four-stroke cycle engine.
Electric cars are at a similar stage as what petrol/diesel faced and Hydrogen is further behind - yes, there are concept cars out there using H2 but the big issue for them is the storage of H2 onboard - in short, they need to find new materials that are lighter than lead.... H2 atoms are so small that they even leak out of sealed glass containers..think of a wine glass with a lid on it, filled with hydrogen and, bingo, next morning, you wouldn't have any. The solution may be in the area of nano-silica technology...but that step-chain or 'wild card' is needed to make H2 the car of choice.