I don't know if it was a large percentage or not. I haven't, and certainly wouldn't, claim that it was "most." It wasn't. But I'd need more than both hands to count the number of people who I saw at more than one show on this tour. That's not a huge number, but it's also just my observation - there are shows where I don't talk to anyone or really observe anyone, so the number has to be at least a little greater.
When there were rotating setlists, I saw a lot more people that I recognized from show to show. A lot of those people I don't see anymore. Of course it wasn't most, it wasn't half, it wasn't a quarter. But even if it's 100 people who buy two tickets instead of one, or maybe some 3 or 4 tickets instead of one, that can add up.
Again, I'm not pushing for the band to do something that's going to make them miserable and/or burn them out. I want them to be in it for as long as possible.
But again I have to ask, if they did go back to rotating sets in some capacity (I doubt it would ever be to the extent that it once was), would those who only go to one show, for whatever reason, really be mad at the band and begrudge those who went to multiple ones and thus got to see a few more songs?
When Rush did it (only on a really small scale), no one that I met was upset, mad, whatever about it. A couple people could only swing one show and were able to guess what would be played when and picked the show that suited them best. Others maybe wished they had gotten X instead of Y but were at least glad they could watch X online.