That's definitely the tour wherey the embraced nostalgia
with live shows that rotated songs in and out of the set and made an effort to cover their entire career. During the 70s they ignored most of their pre-Beggar's Banquet catalog and barely varied the setlist during tours. There were lots of 60s songs that they didn't play live prior to that era but that have since made it into their setlists.
It's also when they started bringing in lots of backup musicians and Mick actually started trying to sing again.