.IO domain name reliability issues and how we’re working around them
By that argument you should also stop using:.org, .ngo, .lgbt, .asia, .aero,  .info, .mobi, .pro, , .MN (Mongolia), .AG (Antigua and Barbuda), .BM (Bermuda), .BZ (Belize), .GI (Gibraltar), .IN (India), .ME (Montenegro), .SC (the Seychelles), and .VC (St. Vincent and the Grenadines), .SG (Singapore) and .HN (Honduras) and moreAll are provided or supported by Afilias, the company running .IO.https://en.wikipedia.org/wiki/Afilias