The only thing I'll add to this discussion is that we couldn't WAIT to be done with strollers at WDW, oh my LORD. The minute our youngest was old enough to go without one (I want to say he was 3-ish? I don't remember anymore...) we were like GOODBYE FOREVER STROLLERS, HOORAY.
Obviously I completely understand that some have legitimate medical reasons for continuing to use them (and of course I've got no issue with that.) Honestly overall it's not even that I have that much of a problem with
other people using strollers as much as they do, it's more that I can't imagine
wanting to use a stroller longer than you need to, or wanting to use the biggest stroller possible. Dragging them onto the buses, having to constantly park it in the stupid stroller parking lots (and then trying to figure out where the CMs shuffled it to while you were on the ride), trying not to run over other people, the times your preschooler decides to try to bolt from the thing while you're on the move, having to either rent one or haul one from home onto a plane...ugh. It's such a pain in the butt. I suppose people must be doing it to "maximize" their park time, but personally I
definitely don't miss our stroller days. The extra storage was kind of nice, but not worth the added hassle to me.