I think that is much too optimistic.
I hear you, and you may not be wrong. But on the other hand, a dynamic tipping point may be reached and the growth of electric car sales (new and used) may suddenly and unexpectedly take off (possibly as fast or faster then the above graphical predictions). Why do I say that?
If we had to depend
only on consumer awareness of environmental factors and climate change predictions driving BEV sales, then yes, sales will be slow, steady, and gradual--generational. BUT there is another important factor: EV performance. Elon Musk is arguably a genius for several reasons; but in this case for releasing (roadster first in 2008; then the S in 2012, right?) a car not only more environmentally friendly (to attract educated consumers), but one that could smoke almost all ICE cars off the line. Young car enthusiasts from Maine to California, Texas to Minnesota, and Washington to Florida are growing up with the innate understanding that Teslas and some other proposed BEVs are
HOT. And now there are the more affordable Models 3 and Y. Consider, too, the Cybertruck (and the other anticipated electric PUs.). Once they get over the design shock (give it just a couple of years), Missouri farm boys are going to want that truck, if for no other reason than to impress the school cheerleaders. If range and durability turn out to be as claimed, businesses may want them too.
Despite the hiccups and financial failures in the EV industry, I am bullish on the future of electric vehicles. And if true, we owe it mostly to Musk and his team (some of whom are now spreading out to other manufacturers). Consider
all the many factors pointing toward a non-ICE future. That future is coming more rapidly than we may think.