FWIW, many of the people selling five nines would just claim those 3-4am windows as "scheduled maintenance" and go down for an hour every night anyway whether t

FWIW, many of the people selling five nines would just claim those 3-4am windows as "scheduled maintenance" and go down for an hour every night anyway whether they need to or not... (Actually, if I were an evil ISP lawyer/marketer, I'd try to claim a "Maintenance window of 1hr downtime sometime between 4am and 3am", then ignore any downtime of less than an hour during the day and if you complained about not getting yur expensive five nines I'd laugh and say "published schedule maintenance not included!"...)