^quick spray waxes are great to keep that fresh looked wax inbetween details for maintenance washes.
A big part of my business are actually new cars. Dealership detailer mostly are not very good. They focus on speed rather than longevity, just make it look decent for the customer and out the door and that's for a "detail", for a wash they don't care if they are putting swirls amd scratches in it as long as it's clean.
When a car comes from the factory, its on a truck, then train, then truck again to the dealer. Rail dust, road debris and just sitting around let's all this crap settle on the car. Then, when a dealership gets their delivery of up to 30 cars, they are given a quick wash to see any defects which is then fixed and charged back to corporate. After that it's another quick wash and tire shine and given to the customer, this is why a brand new car looks a year old two weeks after you've bought it!
I've done BRAND new cars. Two of them being acuras, a Tlx and a Rdx both with less than 1000km on them and the paint was in terrible condition, two brand new cars that looked 8 months old.
Two clients got brand new cars last Friday, they called me before they picked up their cars and I advised them to have the dealership detail the interior, but not to touch the outside, not even wash it. Then I went over a week later and both cars were in much need of a clay bar, Polish and wax. This was the outcome but imo this is how a new car should look:
These days dealerships are just not putting in the effort to ensure the customer is getting that nice $40,000 car they just bought. They are all about volume.