FWIW, Gyeon Wetcoat is unbelievably good for a lazy detailer. It's easy enough to apply every wash, not that expensive, beads very, very well, and looks great. I haven't really tested durability because it's too easy to apply. (Literally spray it on the wet car before you dry off.)

Like, yes, carnauba looks amazing. But if you actually use the car, the durability is intolerable vs. the effort required to apply.

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2011 M3
2006 Sierra 2500HD 4WD LBZ/Allison
2004 X5 3.0i 6MT
1995 M3 S50B32
1990 325is
1989 M3 S54B32

Hers:
1989 325iX
1996 911 Turbo