You seem to think there's no difference between a niche market of ECs (as OTL) & an *Electric T which is the most common car in the world. (Even if its sales aren't as large as OTLs, it could be.)
As for the drastic drop in prices, that makes two-car households much more likely. It doesn't demand an end to electrics.
Besides which, electrics don't stop having benefits of simplicity & low-cost operation. Why do you presume people
who have no need for long range suddenly develop a burning desire to drive to California? Or Alaska?

You think electrics disappear? Why does, frex, the Post Office switch? UPS? The power company? The phone company? Taxi companies? (I might even suggest, the police department, if I could be sure a high-performance electric would be developed.) The USPO, alone, is a bigger market than many electric makers had OTL.
Still think electrics just conveniently vanish? If so, kindly explain how "long range" is of benefit to organizations
that never leave city limits, or which never exceed a
known range limit. The local power company doesn't have a particular need to drive from Detroit to Dallas; I expect field service calls can be done within known limits. (If not, as already repeatedly said, ICs can be used.)
There's another reason electrics are attractive to fleet users: low cost of operation, in fuel & maintenance. It takes less manpower to keep them running (fewer repairs) & fewer spares. The issue of the battery packs wearing out is moot, since the cars will be replaced about every five years anyhow.
Why is it so hard to believe IC & electrics co-exist?