I don't want it to be a big argument as there are people on either side of the debate who are strong willed about it. But we'll stick with strollers because in my opinion a lot of the debate about scooters is that we've gotten fatter and lazier over time and it has become normal (yes there are genuinely handicapped people who need it today and in 1971 of course). But let's keep it to strollers.
Old pictures pop up and just like today there were kids at WDW. I went in 1991 but was old enough to be out of a stroller (I was 10). I know full well there were kids when I went too. Families and such were all around us. But looking at old pictures not only is the park less busy, there are clearly tons of less strollers. So what do you think changed? To me it is kids being as lazy and obese as they have ever been and parents being as lenient as they've ever been. Which is a bad combo. We went in November 2017. My kids were 6, 3, 18 months. The only one who was in the stroller was the 18 month old. Our three year old is pretty light and at the end of the night she just slept in my arms for the final hour (even through Haunted Mansion). So if we didn't have our 18 month old there would be no stroller at all for us. Our kids can walk just fine. Plus it is a nuisance parking it and un-buckling a toddler over and over.
We probably are going in October of this year. This means my kids will be 7, 4 and 2 and a half years old. Chances are I am going to go without the stroller (there are other family members who will likely stay back at the resort and gladly take the youngest for the day). Even with her though, I am thinking of going without it. It likely won't be needed. She'll be bigger by then, that's 7 months. It was such a pain in the neck getting the stroller collapsed and up into the tram taking us back to our car.
Anyway, that is my take, so what is your take? Without getting into a battle with each other, what is the main cause for the spike in strollers in the parks? Is it just more families, lazier kids, enabling parents, a younger crowd than years gone by?