It's worth noting that the meme of "it was DNS", including the haiku[0], is from the old school sysadmin world, which has a lot more terrible DNS implementations than modern stuff (especially including Active Directory which has DNS attached to a massive complex system that does dozens of other things as well and because of which has its reliability suffer), so the meme is really a reflection of a harsher time.

[0] the original source of the haiku: https://www.reddit.com/r/sysadmin/comments/4oj7pv/network_so...