Just wanted to say something about this. Andrej Karpathy (Ex Tesla AI/FSD Director) mentioned 2 yrs ago in one of the interview with Lex saying that Tesla Vision can do distance measurement and there is no point having additional equipment like radar to measure close object distance; Radar was there when the tech wasnt ready at that time, its always their intent to remove radar.
Parking sensor(radar) are just older tech that works, but its redundant(Karpathy's word) when the car is travelling above moderate speed, but Vision can do all the things that radar can do at low speed, hence the decision.
With Hardware 4 and higher resolution cameras and more powerful onboard computer for processing the feed, on the current Model S, Vision will be able to do their job well. And also, without radars around the car, looks even cleaner and minimalistic imo. So, you are not getting an inferior car dw.