It's refreshing to hear of C&Vers who use and have used zero-offset posts.

For years, all I usually heard of was from those looking for seemingly ever-more offset, which to me makes a road bike into, ...something else.

I'm 55 now. I've noticed that with a more-forward saddle, a more comfortable reach to the bars is achievable without having to shorten the stem extension (which would tend to overly quicken the steering feel of many a C&V frame). The forward saddle also rotates the rider's lower body forward, such that a more aero position is had with less bending at the waist. The rider is also rewarded with a quicker and less-strenuous transition to a standing position for attacking steep grades, which allows more-frequent adjustment to one's position in response to terrain.

Here in this crowd though, I must be preaching to the choir, and to those who perhaps perhaps ride on frames built to the large side.
<<<So let's see your C&V bikes set up with zero-offset fitting!>>>

The build below typifies one of my fit re-doings, since this frame is large and the stem was increased from an 80 to a 115: