Acknowledging the thread drift, the MU2 only started to have similar accident rate after specific training was developed for it (CAA/CASA required it here too). Prior to that, it had an accident rate higher than the average. Airframe ice was a major issue whereby it could & would stall without warning (i.e. no stick shaker activation or aural warning). I don't think the MU2 was purchased by wealthy business people here, rather than being a cheap turboprop aircraft for charter companies...