It's not that it's thin, it's that it's brittle. The issue is the EPA and their global counterparts; the older 2-part linear urethanes did NOT have to go on thick but they were INSANELY tough along with being unbeatable UV-stability wise. And impossible to match/blend too, by the way, as there was no "separate" clearcoat on top. They just didn't fracture.
Well, the chemicals used (specifically, the hardener) in that stuff are NASTY. As in "kill you" nasty; they contain a cyanide compound among other ugly things. They're no longer legal to produce or use nearly anywhere (exception: for a boat you can still get the stuff in Mexico, of all places -- at least last time I heard, which was a few years ago.)
The "replacements" were able to be formulated to look as good and be somewhat reasonable in UV-stability, but NOT to have the same fracture resistance. That was the big "give" point. So more paint won't help with chip resistance; it's just heavier. The issue is more-or-less constant across makes and models and will get worse as VOC regulations continue to tighten worldwide. The result is chipping when impacted by stones and similar; an utterly common event for a car that travels on actual roads. Oh and the UV stability issue is real too, if somewhat less - witness all the UV-burned vehicles in places like Florida. Wax does exactly ZERO to stop that by the way.
Unless someone comes up with a formulation that has the old linear urethane toughness and UV stability without the chemistry issues (unlikely) we're stuck with it into the future, like it or not.
burned vehicle in Floria? Wax does nothing to stop it? It may not stop it, but it will delay clearcoat long enough that by the time you get rid of the car, it won't have clearcoat damage. The biggest factor to clearcoat damage is not washing the car, and of course, never waxing.
My old cavalier, I would never washed the car, waxed it only once lol and of course, after 10 years, the paint was complete shit, yet other cavaliers I would see on the road and even today, have no clearcoat failure. In the end, it all comes down to how much you take care of the paint.
Even a thin paint like this one, can be made to last 10 years if you take care of it. I put a sealant on this thing every 2 months. You may have rock chips, but you won't have clear coat failure. Live and learn, next time, I will NOT buy a Mazda unless they improve this paint.