I think some assume radical changes will happen very quickly in the auto industry because it happened in, say, cell phones.
I think changes happen in auto industry much more slowly. For one thing scaling up is very difficult. Second, people are a lot more conservative with a large purchase - especially one that can kill you. How many will buy Chinese made cars vs Chinese made cell phones, for example.
The switch over from ICE to EV will unfortunately take decades, not just a few years. This gives even the laggards like Toyota and Honda time to catch up. All the big OEMs will survive the transition, some with government help. Do you really think Germany will let MB or BMW go under? How about Japan and Toyota?
The other thing to remember is that EV infrastructure needs to expand a thousand times before the average person would consider owning an EV.
I think the rate of adoption might be surprising.
A Model 3 like vehicle will save many Americans money from day 1 of buying it. Less gas costs, less maintenance costs, even compared to cars that are fully paid for.
You already see this with vehicles like the Leaf, but in a much more niche fashion. People are literally paid to lease a Leaf, even if they still keep/own their ICE, for those who drive in a "goldilock's zone" of commuting miles/climate/etc.
Once that niche expands to include "everyone but renters", there will be a huge jump of people. Once Tesla solves the charging problem for renters (if they do it right with supercharger and/or autonomous driving and auto-charging), there will be another huge jump of people. The Model 3 won't fully make that first jump unless they can match the leasing deals on Leafs and other low-cost EVs, but they'll capture a huge chunk of the market. Once that first huge chunk is captured, you'll see large numbers of converts based on performance/experience alone.
The funny thing about the basic phone to smartphone conversion is that smartphones are much more expensive than basic phones. Much more expensive plans, much more expensive devices. Car cycle life is 3-4x of a basic phone's cycle life but the advantages of a Model 3-like vehicle over the average gas car is incredible--it's like going from basic phones to smartphone, but you save a lot of money by doing so.
It's actually not much different than Ford and gas cars earlier this century, ironically enough. Gas cars going from a niche to exploding, well before infrastructure was in place, simply because cost was lower and the vehicles were superior.