How about services you use a lot. How many hours has hacker News been down in 2015 (yet you are still on it right now)? How many hours has netflix been down in 2015? How many hours has entire chunks of AWS been down in 2015?

Every business is a spectrum. A HFT trading shop may decide that 1 second downtime per day is their max outage. A webpage advertising a pet adoption event may decide that 6 hours of downtime per day is the most they can tolerate. You have to make this decision for each product, and even better -each part of each product.

The entire point of this post thread was the idea behind "I can not use DO for serious stuff until they implement load balancing"... which is silly for most businesses. And even those businesses that need high uptime, I offered (and still believe) that DNS round robin is a decent way to get HA for almost no money.

You link to an article about it, but miss the boat. What other solution can I implement in a few minutes to provide available load balancing between any two servers in the world (same or different host provider, same or different datacenter, same or different continent).

Sometimes the relatively simple solution is "good enough". Sure you can find a wikipedia page saying where it is not perfect. I would not DNS round robin a HFT trading app. I have no problems on it for 99.99% of the web though. So much of the web has NO failover of any kind, stupid simple DNS round robin would be a vast improvement for most websites.