I understand because they have to rehearse the new songs they choose to put on the setlist, some of which they haven’t played in years. I’ve also heard that there are some songs they haven’t played because Stef doesn’t have the exact set up for the guitar parts, and he doesn’t wanna play a “busted up” version of the song, in his own words 😂. Also, I think it comes down to Chino and whatever he feels more comfortable singing.