Me: Mr. Customer, you really need to upgrade your servers. Everything from the OS to the web services to the database engines is EOL and you'll run into nasty trouble
Customer: Blah, blah, not a priority
Me: Mkay, but I'll remind you from time to time, because I don't want to be held responsible for your negligence
Three(!!!) years later, customer's servers gets owned by script kiddies, all services redirect to porn and weird ad referral networks
All of sudden, server migration is top priority, and of course it needs to be done yesterday
#ToldYouSo