Uhhh nitrous on anything without a good tune = blown motor. Regardless of NA or forced induction. There is no reason why a turbo car with a reasonable shot and proper tune shouldnt last just as long as its NA counterpart.

In the case of Subies, WRXs/STis need a tune to run well with even the most minute changes in parts. This is probably even more true when adding nitrous. So the guy who throws a 70 wet shot on his car and just makes an educated guess on his fuel jet shouldnt be surprised when he assplodes something. But guys who take the time to tune for the spray (like Sam @ Coastal and URFUCT did when they had their cars) are able to run it for a decent amount of time without problems.