Do you see a lot of urban trees naturally propagating?

Living in an urban forest, ripping up wild young trees is part of normal yard maintenance. I probably get at least a dozen a year. Two of my full-sized trees in my yard were wild seedlings that I allowed to grow because I like those particular kinds of trees (a catalpa and a sumac), and they were in good locations.

This also includes invasive tree species like buckthorn, which is a villain in our area. Buckthorns pop up constantly.

I guess one could view urban tree dynamics as extreme selection for certain traits. They have to be pretty, and in a location that won't inconvenience humans, and they can't do anything to inconvenience humans, like cause allergies, and they have to be extremely resilient.

And around here, they have to be ok if it hits -20F sometimes in the winter.

I have a magnolia, and it completely boggles me that it survives and thrives this far north.