With properly adjusted derailleurs I've never dumped a chain to the outside and only bounced the chain off the catcher back onto the small ring a few times cornering on bumpy roads, at least one of those after the lower derailleur pivot gunked up and needed cleaning to immediately tension the chain after a shift.

There's a lot of latitude in how you optimize (height, rotation, their interaction with tension/limit screws) a modern front derailleur so the bumps and curves hit where you want them to and you have the minimum practical chain clearance once it settles on a ring. I find it technically more involved than building wheels although obviously it only takes a tiny fraction of the time.