If I could buy a type of vehicle that was only 10% thermally efficient but the fuel was practically free, that would be pretty cost effective even if not thermally efficient.
Once EV manufacturing is decarbonised (which is I assume ongoing) this will be moot too.
EVs here make the most sense if you have solar panels on the roof, something to store the energy in and obviously a house.
Most of the Poles don't have a house.
Edit: superchargers map https://www.tesla.com/pl_pl/findus?bounds=60.47900349927211%...
I know it's not about Tesla only, but it says something.
If the energy company didn't buy our electricity, we would be forced to use batteries to store the surplus to charge the EV batteries.
The only disadvantage is that during a blackout, we still produce energy but can't use it. Fortunately blackouts are very rare in my region.