The French taxation situation is interesting.
I think it's an excellent idea as something had to be done about encouraging people away from the ever increasing weight of monster SUV's.
The idea that a 2.5 -3.0 tonne EV is a zero emissions vehicle is just nonsense. Compared to a smaller EV there were more emissions to build it and there will be more emissions to run it for a long time to come.
Adopting the French system in the UK would get my vote