The most important question is how common this is and how severe the average case is. If it only affects one car in 20 then the main effect will be bad PR for Tesla rather than a noticeable diminishment of owner enjoyment.
I suspect its fairly rare tbh, it being common would likely have been raised years ago and a fix (including coating) implemented.
It was pretty openly touted as coat-less stainless steel from the announcement. Their hubris would have never allowed them to add a clear coat.
They still haven’t added rain sensors or proper blind spot monitors because of hubris, and those have been common complaints for years. What makes you believe this would be different?
What even is this answer? People are complaining about it right now. The owner’s manual explicitly states it’s a potential issue. By all accounts this is a known and actively occurring problem.
What, exactly, is there to “find out soon enough”?
Per TFA, the official maintenance documentation says
"To prevent damage to the exterior, immediately remove corrosive substances (such as grease, oil, bird droppings, tree resin, dead insects, tar spots, road salt, industrial fallout, etc.)."
which inidcates that it is a known concern. Essentially nobody who uses CT as an actual vehicle is going immediately remove every little substance that gets on it.
Assuming that Tesla would never let a common issue make it into production seems counter to basically the entire history of the company.
The company that went for cheaper non-automotive touchscreens and then when they started failing under warranty made everyone's car run the air-conditioner to prevent them from delaminating at huge energy cost to the consumers.
I suspect its fairly rare tbh, it being common would likely have been raised years ago and a fix (including coating) implemented.