The infrastructure grew as more people got cars, and the early adopters planned their trips more carefully.
...fine, but our expectations of car travel have evolved along with that infrastructure. Electric cars released
today have to compete with a well-developed gas-driven infrastructure that grew up over decades.
There are also fundamental problems:
1. Teslas can have decent range because they're large cars with plenty of floor area to hold the battery, and are built with expensive lightweight materials and techniques. Matching that in an affordable, compact car is going to be tough.
2. Tesla are probably getting cheap/free land for their charging network because Telsa owners are wealthy and shopping malls, restaurants etc. like the idea of attracting a few wealthy people. If EVs become mass-market then the charging stations are going to have to start earning their rent. Tesla-style free charging is probably unsustainable.
3. Charging takes, say 5-10 times as long as filling with gas. That means people are going to go off shopping, eating etc. and probably leave their cars taking space at the charging station for
even longer . The current style of recharging station - with a couple of chargers in a car park or a filling-station-style forecourt - only works when EVs are rare. If EVs take off, then you're going to arrive at the charging station to find all the bays occupied and the owners off having lunch somewhere. Charging stations will have to evolve into parking lots with half the bays wired up (and a consequent parking battle between EV-users and gas-burners) - probabkly meaning that sites will need their power feed upgraded, too.
4. "But people will charge overnight and only need recharging stations occasionally so we won't need the current capacity...." Well, maybe if they can charge at
both ends of a trip. I have a drive and garage - so I could charge at home, but I can't guarantee that my destination will have parking with a power point in range... so even on a 100 miles-each-way trip in a 200 mile range car I'm going to need to stop for a recharge to be safe. Also, I don't know about the US, but in the UK filling stations along major routes (especially motorway service stations) already charge a hefty premium: you don't set of on a half-empty tank if you can possibly fill up at a local supermarket first. Yet the motorway service stations still do a roaring trade. If EVs take off, its going to be the need for supermarkets and local filling stations that goes, not the ones on major routes.
Remember, they didn't even have mobile phones to call for help if they ran out of gas.
In the UK, you just had to make sure that you broke down within walking distance of an
AA Box (Note for Americans: AA=Automobile Association, not the other AA!). And the motorways have emergency phones at walking-distance intervals.
or carried a gas can and a good pair of walking boots in their "boot".
...which is another option you don't have with electric vehicles.