Today’s paint jobs will hold up pretty well without waxing, as long as you wash the car frequently, but waxing does still make a difference. If you have alloy wheels, that’s one area where waxing can really pay off, as brake dust is quite corrosive over time. If you’re interested in doing this, I’d say to go for it.
How do you normally wash these cars? That can have a big effect on the finish over time as well. Hand washing (with clean supplies) is best, of course. Touch-free automatics do a pretty good job (although I don’t like to see people dry their cars by hand after this, because the car really isn’t as clean as it looks). Soft-cloth automatics aren’t great but usually won’t do any immediate damage. Automatics with brushes and the brushes in the self-serve bays are to be avoided at all costs, though!