There are network effects, maybe not as strong, but they're there. Theres the supercharger network, if you have one car of a certain brand in your house hold, the others are probably disproportionately likely to be of the same brand, and this can radiate out to friends, family and work colleagues. Theres probably a 'no one got fired for buying IBM' element also. Tesla is kind of the default electric car, you aren't going to be judged harshly for buying one because most ev buyers do.

I'm struggling to think of any individual car manufacturer that has driven other manufacturers out of the market. The market doesn't really work in a way, capital requirements are too high, lead times too long, to make that possible. Its still reasonable for them to forgo short term profits, just not quite to the same extent as the winner takes all nature of the internet.