I have some dedicated servers with over 7 years uptime now. Only time they were unreachable (not down), when datacentre had a network maintenance and that was a

I have some dedicated servers with over 7 years uptime now. Only time they were unreachable (not down), when datacentre had a network maintenance and that was an extremely rare and short event. The points you have listed are important, but are really non-issue unless you are co-locating servers in the utility room somewhere, rather than in a proper data centre.