There are several things I've learned since procreating in a very pedestrian town where strollers get a lot of use. If ours had an odometer, it would read hundreds of kilometers. The first is that it's actually a lot easier to walk when you are pushing a stroller. Presumably this is why the less ambulatory elderly use walkers. I find that when I'm walking around town without a stroller, it feels a little weird not having my hands out in front of me. The second is that a pushing a stroller makes you very aware of the unevenness of the road; curbs and bumps become much more important to your conscious mind. The third is how incredibly useful it is to have a large bag and storage compartment with you at all times that you are not carrying. It's warmed up and you don't want that jacket anymore? No problem, just stick it under the stroller! Our lack of stroller during our heavily ambulatory trip to San Francisco was very salient when we had to carry a backpack and tie our jackets around our waists. Yesterday Nora insisted on taking her toy stroller and baby doll out on our walk with us, where she mimicked all the actions I'm so familiar with, like stopping the stroller and walking around to the front to address its occupant. At one point she decided that she had to carry her baby for a little ways, which any parent can tell you makes it doubly hard to steer the stroller.
Later in the walk she decided that it was too sunny for the poor baby doll to be without sunglasses, so she took hers off and insisted on putting them on the doll. Towards the end of the video you'll see that she's trying to take her coat off because she was too hot.
She's advanced just a little bit since one year ago when she could just barely stand up.