personally I think waxing the paint isn't needed anymore with modern paint systems. My fathers car, which is 11 years old, never waxed - only washed still looks perfectly fine. No clear coat damage. Freshly washed and gone over with some detailer or spray wax and it looks better than new.
I find it most important to wash and clean regularly, waxing and sealing in my opinion is an optional step that provides somewhat of a protection but mostly shine.
If you think about it - the most damaging elements for the paint job are UV rays, bird droppings, acid rain, fallout, road grime. Carnauba wax doesn't really stop any of these etching into the paint, even a quality sealant can't hold up against these. Maybe a ceramic coating has some resistance to offer. That brings me back to the point that regular washing and cleaning is far more important to keept the paint clean and free from damage. Waxes and sealants might help to keep the car looking cleaner for longer, but in reality they have not much to offer in terms of road grime, bird droppings and so on.
Personally I haven't seen heavyily failed clear coats in the last 2 decades, and if - it's not a failure of not waxing, it's simply a bad paint job. It's much more important to keep the paint clean from road grime, bird etchings, tree sap, fallout and other various contaminants.
On my cars I nowadays use a wash and wax and drying with a detailer - currently Meguiars wash and wax and Meguiars Ultimate Quick Detailer / Quick Wax. That's it. By doing that light maintenance I'm already doing much better than 95% of the car owners.
On my motorcycle I use CarPro Ech2o as a waterless wash - works fine and has protection built in.
I tried various sealants and waxes on headlights to keep their clear from failing, which is the most vulnerable part on modern cars, that didn't work. I got them polished ad repainted with headlight paint - so for the next 10 years I have nothing to worry about.
I used to wax and seal my cars regularly, but now in retroperspective, it didn't really do much in terms of protection. On my VW Phaeton I have 3 layers of CarPro CQuartz UK, which brings nice gloss, nice beading and sheeting. But does it add longevity to the paint? I don't know, the Phaeton has such a superb high quality paintjob, I cannot imagine it to fail under any circumstances.
Furthermore nowadays paint systems by the manufacturers are tested for the regular customers, which means it has to live up against irregular cleaning cycles - and if cleaned it must stand up against harsh automatic car wash cycles.
Furthermore, after years of intensive detailing (and a lot of spent time) I nowadays am a strong believer in the theory: The less you touch the paint the better. Less touching = less swirls = less dullness.