I know alot of parents look forward to the day they no longer need a stroller, but we really enjoy having ours.
We have had ours moved, but not stolen, but someone did take a fanny pack off of the handle while we were on Buzz one year.
We did our last trip in Sept. without our stroller (forgot it) and even though we took afternoon breaks, we missed our stroller. Neither of my boys (6 and 4) use strollers outside of theme parks and they did a 5K walk with me last January but at WDW they are so excited they don't pace themselves very well.
They want to run, skip or hop from the time we leave the room! By the time we got to Main Street, the little one was tired! A stroller allows us to pace them better, and to keep up with them in crowds.
I did purchase a Safari TT single stroller specifically for our Theme park trips so that DS's could ride even when they are older. The tires are pneumatic and it was a dream to push and when in a pinch, both boys could ride without weighing it down.
It was also nice to have a comfortable place for the little one to nap when we returned to watch Spectro. We are not Commando's but there is alot of walking just to get to the front gate of the parks, once you leave your hotel room and I've also had mine fall asleep on the bus back to the hotel and it is difficult to wake them and have them be coherent enough to walk and at 65 pounds they are too heavy to carry.
So as long as we have our Safari TT (hopefully no one will take it)we will continue to take it and use it.