It depends on a number of variables including whether someone has modded the car beyond the stock Paxton kit,; how lean the calibration is at full boost; how far the rev limit has been raised from stock, if any; the effectiveness of the intercooler; and the proper operation of the fuel delivery system. A Paxton kit installed properly with a conservative calibration like Dan Cragin did for my prior car is very reliable and durable. Mine was bullet proof.
There are always those people who push the limits to far who end up blowing up a motor. It used to happen all the time with kids who modded Ford Lightnings to produce ridiculous boost levels on the stock Lightning engine and then wondered why the engine blew up.