In addition to the optimization
@Larry in TN mentioned, Tesla has developed a mobile Supercharger solution - Several Superchargers on a flatbed semi fed by their Megapack batteries, for temporary use in spots where they anticipate being under capacity for holiday travel.
There were some horrendous lines early on in Tesla's history, but more recently I haven't seen any stories about anyone not being able to charge in a timely fashion on a holiday travel weekend.
This. This right here is why these threads turn into the "zealotry". Those of us who know better, have heard people take the result of a "joke" and spout it as truth. There's so much misinformation about EVs, it's hard to take a "joke" lightly.
They were cutting the cords at Superchargers too.
I'll believe it when I see it. I've been hearing about these "super-batteries" for a long time, but nobody ever gets to the point where they're better than the status quo and mass-production ready. And like Elon said about this sort of thing at one point, Tesla buys more batteries than anyone else in the world - In fact, for a while there they used more lithium batteries than the rest of the world combined - and if you really have something that works, show it to them.
Yeah, but... I don't know that it'll even be "a few" years. I think Ford should be delivering vehicles with the NACS connector by now (or at least, I saw a news article that they've given away all of the free adapters...) and within ~2 years it'll be everybody. Recent model years have adapters available. Chrysler is a possible exception to both of those.
Of course, that's only for new cars, but they'll trickle out into the market and the pre-NACS EVs will die off eventually.