At one point, the Snap Preview gizmo was a big hit, and really caught on widely.
Then, five minutes later, people were all like, turn it off it's so freaking annoying!
Now, fifteen minutes down the line, you can even find ways to kill Snap forever.
I'm sure it seemed like a great idea to the developers. To have it fail must be bad, but so much worse to find it on a death-list. Still it was a PITA.