I'm not in the same league as Don, Donny and Gary. I always have set lists embedded in folders. I have over 2 dozen. For one hour NH gigs, I only use midi files and they are in a preset order. I have alternate tunes for each song depending on audience response. For the one hour gigs, I use a keytar, so registrations are out. Eg; When I play inner-city gigs, there are several R&B tunes that are must play, I’ll have 20 or so in order, and I have 50-60 or so in that same folder in alphabetic order. I have themed folders set up the same way, Mardi Gras, St. Patty’s, Oldies Rock, Oktoberfest, Italian, Cinco De Mayo, Jimmy Buffet, etc. as well as a couple that are set up with what always works with particular audiences and situations. For my restaurant gig and other than NH & senior ctr. gigs, I’ll use a keyboard, midi accordion, or a controller and use both registrations and midi files.
I do miss the Korg songbook feature.