I think there are plenty of songs that will never be played live again, but I don't think it has anything to do with Richie being there or not. I don't think there's any song that Jon would NOT play because of some connection to Richie. Jon wrote or cowrote every song in the Bon Jovi arsenal, barring She Don't Know Me, so nothing is off limits for him. If they can get Phil to fill in for the talk-box parts which seem so essentially Richie, they can certainly get someone to fill in Richie's vocal parts which are not that unique. PS. I know Riche didn't create that talk-box sound and I'm not trying to be disrespectful to anyone who came before him.