I wonder how many golfers in this forum still have older generation clubs that they won't take out of their bag.
For me it is a Ping Eye 2+ BeCu lob wedge that I bought in 1990. I have tried a lot of other makes and models, but this club is still in my bag. (PING stopped making all BeCu clubs after 1998 because of health issues to their workers and environmental concerns.)
I also rotate a few putters in and out of my bag including a B60 (1976) and an Anser2 (1979), but the Ping Eye 2+ BeCu lob wedge never comes out.