Now, you are right that you get diminishing returns as you add more nines, but 95% is still in the area where there are a lot of cheap things you can to to incr

Now, you are right that you get diminishing returns as you add more nines, but 95% is still in the area where there are a lot of cheap things you can to to increase uptime; RAID, a ups, and even a low-end but business-grade connection should get you around two nines. I have a SLA of 99.5% (over a month) on a low-end setup[1] and it's fairly rare that I don't meet it, even including planned downtime and network outages due to DoS or mistakes of my upstream. [1]I use RAID and mostly supermicro server grade hardware with ecc ram, but there is no failover across servers; I'm in a data center, though it's a low-end data center with a low-end bandwidth provider.