Almost a good idea.

This mystery tree holds on to its dead leaves through most of the winter. It has a nice symmetrical shape and is very hardy so it is used a lot as a street tree. You can see it downtown on Bond and Wall Streets.  In theory, holding on to leaves should mean less clean up. Really, it just means that SOME leaves fall ALL WINTER LONG! I mean, its not like persistent berries or fruits that might provide winter food for the birds or extra color interest in the winter landscape. Nature came up with an almost good idea- less raking in Fall, maybe- but brown leaves just aren't that fun to look at all winter.  What tree is it?