It was quite common in the 90's, but people still say it. It can be rude, but it depends on the context. Usually it's said in casual situations or between friends; how rude it is will depend on the nature of the circumstances, i.e. if it's a minor thing versus serious thing. But, it basically just implies that you don't have sympathy for the person. If it's said over a minor thing, it can come off as a joke between friends, but if it's said in response to something serious, it can be very rude. Obvious, maybe, but there's some more info.