The thing is that, for example, for programming questions google finds it on SO without any shortcuts needed. If I type address in Google it will give me a link to the map anyway. I know it takes a second to type !whatever, but you need to remember that. And if you need to stop and think "was it !so or !s or !stack or whatever it was?" you lose your concentration and next thing you know you've spent half hour browsing unrelated articles on Wikipedia. Exaggerating a bit but the point is these !things are a speedbump.