there is a functional difference between a pivot pin with an oil bushing around it, and a hole..

Tight tolerance vs Loose

I ride a Rohloff hub bike now , the Derailleur one hangs on a peg

Campag Euclid, Rally Mavic 851 My Shimano is an older LX deore..

I worked in bike shops

Watching the one more speeds makes 1 bike better than another

is just a spectator sport now.