3 hours outage per month is ~99.5% of monthly uptime. Recently I was reading about SLA for all cloud's durability, availability, uptime, etc... with many-many

3 hours outage per month is ~99.5% of monthly uptime. Recently I was reading about SLA for all cloud's durability, availability, uptime, etc... with many-many nines. But somehow, there are always some unforeseen factors, where your end-product SLA is still far below these numbers. I wonder, if there are any statistic on SLA of apps-in-the-cloud vs app-in-colo/dedicated and which one wins?