Rounded, or domed ones specifically. Do you use them? Have you tried them? Got an opinion; post it here.

The thought of upgrading to them has crossed my mind, but I'm wondering if there's a benefit beyond the perception that it reduces friction in the pathway. I swore I wouldn't get this far into tinkering, but the thought intrigues me. What are your experiences with them? I haven't been able to find much using search, so I'm wondering if it bombed or is ineffectual in reality.

The two parts I've been looking at in particular are the Lantac UAR and the POF, cam pin.

I get that parts are consumable thanks to wear and tear, but is there any kind of performance improvement in addition to reduced friction? Is it part of a bigger set of improvements like the UAR that gets the benefits going? What? If you have an opinion on this dump it in here. Thanks in advance for the education on this subject.