Our family has 4 iPhones, two 11s and two 13s. We've had some little issues like battery health, my charging port is finnicky, etc., and we are due for upgrades from Verizon. Looks like we can all get free 15. I don't keep up with new releases, etc., but is there any reason not to upgrade to 15? I don't there's any specific feature we need, just wanted to make sure there wasn't something that made people avoid the 15. We would be getting the basic 15 not pro or Max. I think they all have USBC which would be nice. Thanks!