I'm a fan of both Bon Jovi and U2. I know that after 30 years (and slightly longer than that in U2's case) artistic evolution would necessitate you'd be in a 'different' place than you were at the beginning of your career.
The one thing I especially like about U2 live -- (and I'm basing this on YouTube vids of live shows; I haven't seen either band live myself) --is that the band doesn't shy away from the early stuff. Here is one of my favorite performances by U2 in 2005, doing the song "Electric Co" from their first album, released in 1980. The tempo is slowed down some from the early 80s performances of it, but the fire, the energy, the passion is still there -- you can hear it and feel it. There's a hunger there, even if it's tempered somewhat by time. Even if they don't actively feel that way anymore, they still /remember/ it and can still summon it:
This is what I wish Bon Jovi would do more often with their older music. They have 30 years' worth of material. I don't dislike new music or going in a different direction, but acknowledge the journey, at least, and dig deeper into the back catalogue. If casual fans don't know it, then they'd get an education. I was casual fan of both Bon Jovi and U2 until I explored their deeper album cuts, and found I liked them better than the hits.