A future conversion of users about a some web application like, say a game:
User A: "Hey have you checkout game XYZ it's pretty fun"
User B: "Nope, just a sec."
<some while later>
User A: "And what do you think?"
User B: "Yeah it could be fun if it wasn't completely broken."
User A: "Why, what's wrong with it?"
User B: "I've got a pretty good machine but this runs pretty shit, I guess the programmers are just clueless gits."
User A: "I've got a pretty similar machine, runs great for me..."
User B: "Yeah whatever, I'm not playing that steaming pile of shit."
<in some marketing department somewhere>
"Our sales aren't looking good, we just can't retain and acquire users..."
Good job. Good job. Keep it up. You'll kill the web eventually if you keep going like that.