From what most people are saying it seems odd now but it won't in a a year or twos time. Nobody turns their wireless routers off at night do they?Can't say I'd be bothered if it was always online. My broadband hasn't been down for a long time.
We went without for about a week in 2010 but that was due to cancelling sky ADSL and going to BT infinity (there was no migration system in those days for fibre), apart from that I can't remember the last time it went down, maybe when we were with Orange in 2007.
I'd still be surprised if it is always online though.