Not trying to start a debate..., but in college, I interned with BASF - automotive coatings. 4 summers, all I did was R&D projects with paints specifically for plastic parts.
With new clearcoat formulations, waxing can actually blemish your finish, giving you a lower DOI (distinction of image). Yes, application has a lot to do with this, but so does the chemicals in waxes. Even those that are marked "clearcoat safe".
IMHO..., automotive wax became popular when clearcoat development was nil..., there's a lot of money in it, and I'm sure a little R&D in paints isn't going to stop those companies from making coin. Fact is that it's somewhat being phased out when you think of new protectants in clearcoats, and the life expectancy of the part. I'd stick to ol' fashioned water, mild-detergent, and a soft cloth of sorts.
I do use Plexus, however..., it is more of a cleaner than a wax, though, gives ya the "wet" look.