But I like the 10mm, especially the beefy, early G20's with their heavy slide and simple single coil recoil spring. There is always somebody who compares .357 to 10mm. The magnum begins to shine with longer barrels, 6" and up, but long tubed revolvers are clunky to holster and carry for prolonged periods.
There was a reason for the swivel holsters of old, when 6" service revolvers were more common.
The G20's attraction is that it delivers its performance in a flat rugged, portable package that is very simple to carry, and is reliable and shrugs off abuse. The N and L frames, in my opinion, are too big, especially with the longer, performance delivering 6" barrel, for continuos carry. Add snag gouge prone hammer spurs, damage susceptible adjustable rear sights, big wooden target grips, and I believe you move away quickly from a portable powerful pistol, to a speciality hunting rig or the like. That leaves the K frames, which can be a bit hard to shoot with all up ammo.