How in the world did Genesis produce not just two superstar solo acts (including the drummer!) but become an arena filling act in its own right?

Ah, got it. One of the two anecdotes that stood out was Gabriel struggling with taking care of his family following a very difficult childbirth and how that pulled him away from the band when they were trying to record the new album. (Combined with a long commute, it sounded like it limited his time with the band, and that allegedly caused more pressure when they complained about it.)

With Collins, I guess it's the well-known divorce that inspired much of his solo debut. Apparently his version is that she was angry that he spent so little time with his family. He refused to compromise on an upcoming tour (I guess she wanted him to pull out of some shows and come home) so she told him she was leaving with their children and moving to Vancouver. After the tour, the band talked it out and agreed to a hiatus so that Collins could move to Vancouver to save his marriage. That didn't last long - months later she still divorced him, and they all went back to the UK. That seems to be the only version of the story that's been repeated over the years, but apparently his ex-wife broke her silence not too long ago and said she left him because of adultery more than anything else.