So it sort of exists. How come they are not selling like hot cakes?
A few reasons. One of them is explained by the story of the invention of electric windscreen wipers.
Originally wipers were run by engine vacuum. They were unreliable in general and had the awful property that they would run slower and even stop under low engine vacuum, which is characteristic of an engine under open throttle ie going faster which is when you need to see far more than when you're sitting at an intersection idling. Mechanical engineers tried for years to solve the issue but consistently failed. One day a factory electrician offered to come up with something. Of course the mech engineers scoffed at him, what would a stupid tradesman (and an electrician at that) know about making automotive gear. The guy went back in with a design for electric wiper motors which proved far more reliable and functional than anything the mechanical engineers could come up with, and we still use the same concept today.
Electric drives are suffering from the same thing: people refusing to let go of "common knowledge". It's "common knowledge" that cars use a gearbox/transmission to get drive from the motor to the wheels. It's just "how it's done". It's also excessively complicated and inefficient compared to doing it electrically, but it's just "how it's done" and people don't like having something that's their area taken off them even when it's clearly better done a different way.
There's nothing new about using an ICE to drive and generator and then powering electric motors to drive a vehicle. Trains have been doing it for about a century. Before that diesel locos also had clutches and gearboxes by the way. Transferring the drive electrically is significantly more efficient and controllable than doing it mechanically, and far more reliable.
Back to the question though, why don't these few cars sell like hot cakes? The original hybrid Porché was shelved because "gasoline" was five cents a gallon and nobody cared about saving 30% by using electrics, plus electricity was still considered scary and overly complicated. The same thing goes today, people love electronic gadgets, but are afraid of "new" drive tech (that's over a hundred years old) because they don't understand it. Truth is they don't understand how a gearbox or transmission actually works either, but those are just accepted.
Another reason is that there's no real push from the manufacturers or governments to embrace technology because it's superior (eg VHS vs BetaMax) but rather only on what is profitable and sale-able RIGHT NOW. The general public don't understand electric vehicles and have a poor perception of them. Most people think EVs are all just golf carts and have no guts, and no amount of their favourite ICE powered drag cars being humiliated at the track by a Tesla with four people in it will change their minds.
The next reason EVs don't sell as well as they should is the stupid expectation that the infrastructure should somehow magically already exist in it's entirety. "But what if I wast to drive to Perth from Sydney! There's nowhere to charge it up!" is a common cry (with cities replaced by local equivalents of course), when that same person never travels more than 100km from their house. The truth is there are charging points in pretty much every major town and city from one side of the country to the other. Where I live in a town of 8000 there are two public charging points. "Oh that's not enough!" comes the next cry, when really those two are only for people visiting the town. If you live here you charge at your own house unlike filling an ICE vehicle where you HAVE to visit the service station to get fuel regardless. "But they take so long to charge!" is the next objection, meanwhile those same people park their car and spend an hour getting a meal or visiting the art gallery (our two points are near McDonalds and the local Visitor Centre, and at the local art gallery and Civic Centre near the local government offices) with their car just sitting there when it could be charging.
Yes, there are more than a few use-cases where current electric vehicles don't measure up, but almost nobody is saying we should be dumping ICEs immediately. The truth is that for most people, most of the time, an electric vehicle would do everything they ACTUALLY use their cars for with less fuss and effort if only they could get past their preconceptions and prejudices. A series hybrid, like the Volt, would cover even more of the population.