A reasonable range small EV weighs more than that. 3500kg is reasonable. Regenerative braking and brakes in general are much better than when those weight limits were imposed.
A Tesla Model 3 is under 2000kg. Anything above that is either an SUV or a poorly designed car. 2000kg+ is a lot of weight if it plows into a group of people or the back of a car. There should absolutely be an incentive for manufacturers to produce lighter cars.
The EU is working on the M1e car class that has a weight cap of 1500kg. It would be great if cities would only allow cars under M1e to enter.
Anything over 2000kg should require a truck license including retesting every five years imho.