Not recommending anyone try from a liability standpoint, but safely coping with a scroll blade in a jig-saw is the bee's knees. About as quick and clean as you can get in one shot, with a little practice.
All inside corners on baseboard, shoe, chair rail, and crown should get coped. For shoe, I use a jigsaw to cut away the majority of the waste. That's followed up with a razor knife and/or a piece of sandpaper shaped into a roll to fine tune the edge. On trim larger than shoe, I'll often use my m12 right angle die grinder with a 2" roloc sanding disk to fine tune or back bevel.
Last year I coped a bunch of shoe using a cordless cutoff tool. Then I took some medium grit sand paper and glued it on to piece of the shoe to use as a profile sander to sand right up to the mitered edge. (I think it was sticky backed sandpaper).