Ca'nt say I agree it ruined the car.
Yes, 50 years on looking back the change did make the car less asthetically pleasing, I do'nt think anyone would denythat You have to put your self back to 1958 when then the change was regarded as an improvement as it does improve outward vision so makes for easier and safer manoovering. It had to be done to keep up with other manufacuers advances.
If Volkswagen only ever made split windowed beetles the product would never have remained marketable for as long as it did and would have died out in the 50's.
Stock......the new custom