More than likely, they wouldn't. In fact, if any one of them passed on, I think U2 would be over, as a band anyway. I'm certain of it, really. Although, my question on this subject is:
If a member, any member, of U2 died, and they continued to tour....would you go see them?
I've seen them live only about 4 times in the last 5 years I guess. I saw them once on PopMart and 3 times during Elevation. I think I would pass on seeing them if something like that ever happened and they continued to tour. But, I have never seen The Who live. I'm pretty young, 23, and just took control of a classic rock radio station here where I live. I've been hearing a lot of music I have never heard before...and I like it. I had just started listening more and more to The Who about a month or so before their bassist died. I plan on seeing them on this (probably their last) tour.
The Who's manager said that Townshend and Daltrey view the tour as a tribute to John (their bassist). Townshend quickly corrected that statement as he isn't for touring after what happened but feels he owes it to themselves, ticket buyers, promoters, staff, all sorts of people to continue with the tour.
I don't mean this to be such a downer of a post, and originally I was only going to make mention of what that fan had said (it's in this weeks Entertainment Weekly), but the question hit me though, and I was curious as to what others would do in such a situation.