Oh no, Umesh, it's the other way round; it's only the beginning.
When new cars are banned existing used petrol and diesel cars will become sought after, prices will rise, because of the shortage people will properly maintain their cars so they last, people won't haggle on price because decent used cars are harder to find, mechanics will do a decent job as they'll appreciate the final years they can make some money in their profession, dealers will be respected, margins will increase as supply drops... and pigs will fly
The whole thing is a load of bollocks. I'm sick of this shambles of a government.