If I was going to get an EV next time then I think I’d strongly favour getting one via Motability. You can get better / more expensive EVs on the scheme than you can get ICE cars, plus you get the home charger. Also, you are protected from all the factors that are currently deterring many private buyers from getting them.
If the choice is to remain with a petrol car, I think I’m leaning towards leaving the scheme, but I wouldn’t feel compelled to buy a brand new car.