It depends on the original range surely?

Losing 30% of 120 miles is a lot more significant to most people than losing 30% of 300 miles (which >99% won’t within the life of the car).

It also doesn't require the same person to be using the car.

Someone has a 90 mile round trip commute and buys a car with a 120 mile range. Having it drop below 90 miles after a decade isn't working for them anymore, so they sell it. Works fine for someone with a 30 mile commute.