From my experience generics are the most useful at the library level. For containers you obvious want it for many libraries it is useful. Most of the time once

From my experience generics are the most useful at the library level. For containers you obvious want it for many libraries it is useful. Most of the time once you are getting to business-oriented software I think you tend to have more concrete implementations and you don't miss generics much (other than the implementation side where there is the pain of using libraries that didn't have access to them)