But the flight before actually leaving doesn't tell you anything. Yes, definitely check flight status before you leave for the airport. Not going to hurt to check when you get to the airport. But, presumably, one is arriving at the airport (especially if you need to check bags) at least two hours before departure. So, you get there two hours before, check your bags, get through security, then your flight is cancelled.
My point is "don't check bags until you know for sure you're flying" is really not good advice.