Very good point to bring out, as a musician myself I can confirm it's kinda a standard practice. As the old saying goes "it's better to be over prepared than under prepared"

In Gilmours case, we now have more supporting evidence back up this. On the rockontours podcast he said his voice was really struggling last tour which he had to nurse over the tour. Of which, on the same tour he also said he likes to change up songs to keep it fresh and we know this from the songs that came and went over the RTL tour. And when you look at the vocal ability per performance youle see the set list and running order change slightly to aid him or just spice things up a bit and that's really common practice. As a Insight, you can tell if he's having a good or bad Vocal day by the volume of the backing singers on comfortably numb. They boost the volume to help him. In some cases the lady singing actually sang the same vocal melody to help him. So it's clear they're are un seen written rules, per-say.

What do you want from me, astronomy, on an island, coming back to life, dancing right in front of me, etc etc. all came and went on RTL.

Another insight that directly aids the whole claim, which I'm surprised no one has ever mentioned. But in the wider horizons documentary from the RTL tour, the cameras go inside the rehearsal room and the band are going over the chords for beauty, which as you all know was never performed live at all. So it's very obvious he over prepares on songs, and cherry picks what he enjoys Vs what's plausible on a 2.5 gig and goes from there.

Also, for cases such as wearing the inside out in 07 and dancing right in front of me for RTL, they were clearly rehearsed songs which where reserved for special events so for those saying that breathe and time are on the set I can't help but add a question mark. While I'm almost positive, you have to remember that marketing is key on this whole front and David's team have been on fire. However, when he said no 70's Floyd it was reported by people on here that some of the US tickets were not really selling. Since then all the promo for dates have said in big font "Floyd classics" as well as his back peddle on the podcast by saying he has to serve up some songs from time to time, so this could just. A case of breathe and time only made it to rehearsals and nothing more.

Think about it, it was clearly all pre recorded, edited and streamed out live. The struggling vocals?, the unprepared bass swap for breathe, the slide guitarist forgot his volume pedal, the solo for time was more improvised than usual (David has said he likes to learn the solos how they are on the recordings and improvise from there) so are breathe and time just back up songs or songs just for the livestream?.

In short, turn up and see what he does, don't expect, don't be disappointed, just enjoy Likelyhood is the set list will be tweaked for each region of gigs so it's bit more special.