If a band has 3 guitar tracks on a song, I’m totally ok with them dropping one in the live performance. And like Dime said above, I normally expect a single guitar band to drop the rhythm guitar part during the guitar solo. How bands approach this sort of thing is what makes live shows cool. Ages ago I saw Tom Petty in concert and they did Breakdown. As soon as he started singing, “It’s alright if you love me...” he motioned to the audience, and everyone started singing. Then, he stepped back from the mic, and the whole band just played, but none of them sang. The audience, though, sang the rest of the song, and knew all of the words. It was a super cool experience. And apparently it was done routinely on that tour. I’d never seen that before - where the audience sang the whole thing by themselves. So they made a choice to do that for that particular song, and that made it way cooler than if they had just tried to reproduce the album version. I’ve seen loads of shows where the band altered stuff from the album because they thought it would work cool live, and most of the time it makes the experience well worth going to see. Edit: I found a clip of Petty doing Breakdown. This is waaaaaay before I saw them, but they did some of it here. You can tell it would be pretty cool to be at the show.