yes! We use most of these for a pretty large enterprise webapp. > It's a pernicious accident of history that we are taught to accept references to mutable obj

yes! We use most of these for a pretty large enterprise webapp. > It's a pernicious accident of history that we are taught to accept references to mutable objects as normal, inevitable, and desirable in most CS curricula. It is much easier to develop, debug, and maintain immutable data structures instead Except for trees and graphs and the like. immutability makes working with these much more complicated.