Well basically, I feel that they play the singles every show because they know that a lot of casual fans bought tickets to SEE songs like ITE, Numb, WID, etc. and they would feel cheated if the band dropped a single for a throwback like Step Up. I know a lot of us would love it (myself included...SU is one of my favorite songs from that era of the band), but for example, I guarantee some people were disappointed at the show where they dropped ITE in favor of APFMH. So the singles (because of the business logic of it) take up a good part of the set. Besides that, I think they have a huge comfort zone after years of playing certain songs. I think that (as a band) they aren't that anxious to try and venture outside of it by playing a song they haven't played in years. I honestly believe that putting RME on the BIO bridge was something they thought the hardcore fans would appreciate. It's not exactly them going back in time, but it's more like a nod to the community while still appealing to the casual fans that come out to the shows.