Yeah nothing about this means they never got along or didn't have fun together. Also it probably wasn't a 4.5 for the full 9 years. Like if you'd ask me how I'd rate the time with my ex versus me being out of a pretty bad relationship I'd definitely rate now higher and think 'good riddance' but that doesn't mean that when I was in it I thought "I hate this, somebody get me out of here' 24/7. Also my feelings about it being the worst thing to ever happen to me were probably stronger right after I got out because I needed that 'other extreme' to not doubt my decision or consider getting back to something I knew wasn't working for me anymore. Point being: I'm sure they've had genuinely great moments together as well, things and people just change and grow. Put me together with some old co-workers I had great times with and I'm not sure we'd have much to talk about nowadays apart from reminiscing about back in the day. A strong part of the bond was working together towards the same goals. I guess it's not that different in a band.