Today most of these issues are largely resolved and close to being non-issues. The next generation battery technology is likely to place electric storage ahead of gasoline in terms of power per unit volume.
The next challenge to electric vehicles is safety. Before electrics can reach penetrations in the range of millions of units in major markets they'll have to prove they are safe in such concentrations.
Many of the "modern" ideas about electric cars, including exchangeable batteries as an alternative to recharging, were available before 1920.
That all changed as internal combustion engines improved, and the convenience of longer range and ease of refueling won out.
Ultimately, the Thunderbolt had the same problems that electric cars have always had: Along with the modest range, the main deterrent was really the price," says enthusiast Peter Williams. "It was being offered at £2,600. Back then, for that sort of money, you could buy two Minis.
So: Expensive, and not very practical. Not much has changed.