You know, I think I am attracted to the simplicity of them - and the endless complexity that’s hidden just underneath. It’s like putting itself - at one level it’s hit ball with stick at another level it’s deeply complicated interaction of physical systems and psychological processes. The simplicity makes older putters seem approachable and actually experimenting with them is fun, while the complexity of the minigame itself remains challenging and rewarding to try to master. So, to me, what I want out of a putter is data - I want to see how it reacts to different forces I can apply and how those forces affect the line and speed of the ball. I have never been concerned with getting strokes off the card, but I have as a nice bonus. Older putters (primarily solid metal putters with flat milled faces and fewer hosel designs but not entirely) are affordable enough that I can try lots of different styles/materials while I develop my stroke and I feel they speed up the process because they don’t prioritize forgiveness above all else. I have, since I started my old putter journey, gotten to where I am pretty decent with a ton of them but the real treasure is that I have found the couple or three I am good with - thanks Karsten.