Currently I am not sure. Since I switched to modern Callaways I hit my 4i quite a bit for a variety of situations.
I am sure when it comes to my previous clubs. 1973 Hogan Apex blades. Best club in the set was a 2i. And IT was the best club in my bag. Not as versatile as the Callaway 4i, but for a pure 2i there was nothing sweeter.