as a second to this - the way that semi-auto barrels often have a high/raised bore axis vs. a comparably sized revolver (memetaba not included here) means that it's easier to instinctively 'point-shoot' a revolver, whereas a semi-auto requires training to get it where you want it to fire.
There's also the legal/optics aspect of it in that shooting a criminal with a steel-and-wood 357 often plays better to juries than a large-framed polymer semi-auto. This has nothing to do with the actual mechanics of the gun so much as our legal system/how the population understands guns.
Revolvers are especially good in 'occupied' states where semi-autos are often neutered re: capacity and looked down on. The difference between an 8r .357 and a 10r limited 9mm semi-auto balances the issues out.
There's also the fact that (while PCCs DO exist) a lot of Revolver rounds can be made hotter to work as brush/short range hunting guns vs. 9mm PCCs which are generally varminting guns at best.
Also, a number of revolvers can take multiple types of ammo (.327Fed can take nearly any .32, 357/38, 44Mag, etc) allowing for cheaper training ammo vs. carry-/firing ammo.
There's also the "all-in-one" factor for brush/bush hunting - a .454 casull or .44Mag can absolutely be a hunting gun, anti-bear gun, CCW gun (I don't recommend it, but, it's possible).
Revolvers STILL have their niche, it's just a much smaller one than before.