To me this instant, seamless switching desire (obsession?) just cracks me up. Do folks not have rests in their guitar parts? Are we always playing notes or chords, the entire song, non-stop?
Music theory 101 - 1/4 note or 1/8th note rests are just as important as the notes.
I tend to switch patches or snapshots 1/2 or 1 beat before I need it, typically at the "4-and" beat if in 4/4 while muting my strings.
I also use 2 or 3 adjacent presets live, not more, so a single tap works.
People could also opt for a bit more space in their playing or soloing...but that's a whole other topic.
Cheers.
tg