Earlier quoted context omitted.
This is a bit of a "why dropbox when i can rsync" comment. Tesla brought glamour and practicality to a field stymied by boredom and theoretical concerns. They pledged to build an EV people would actually want to use, bringing all the latest tech to drive UX with no regard for tradition. They set to solve consumer problems, and they are succeeding in doing that.
Glamor? Sure. Practicality? Eh. Maybe for daily commuting. When the IC companies convert over, Tesla shareholders are going to feel a ton of pain. The novelty will have worn off and the company will still pace at a mere fraction of its competitors. And at the very least, they'll all have vastly better QC than Tesla.
The "supercharger" network is something that no other manufacturer was doing or was seriously interested in doing, and it's an extremely practical concern.
> When the IC companies convert over
... a lot of them they might well end up buying batteries from Tesla. Tesla will also continue to be the benchmark against what EV will be measured, in the same way Ford continued to be a reference for decades after competitors matched them.