I did the "only spraywax" with on my wife's A8 for its last few years, and I'm currently using GG Ceramic 3-in-1 spray on the Sonic.
That approach is OK, and I don't expect durability from it, but it does *NOT* offer the protection of my beloved FK1000P/BWM1 (or whatever it's now called) which has never allowed any etching of the clear even when bugs/birdbombs were left on for months. Yeah, the sprays deliver good looks, easy enough cleanup if I keep applying at every wash, and yeah they're convenient...but inferior IME in the functional sense with regard to protection from etching and that "easy enough" cleanup is starting to get old compared to how the FK is.
I do appreciate the UV protection of OCW, and I've been using it on the lenses of all my vehicles for years now. Hey, I might as well use it, my gallon will last forever now that the A8 is gone.
I do find it interesting that the coatings (which I haven't used since the v1.0 OptiCoat) apparently aren't offering stellar protection.
Do any of the coatings offer the kind of years-long durability that the OptiCoat v1.0 did? I might pay a local pro to coat some of my wheels if I knew the stuff would last for a few years, but otherwise...