Anybody who thinks anyone has died in a movie anymore is probably dumb. They really do need a new plot device to shock us. The cool 3-D skin effect with Voldemort's death, lot's of fun in the theater, but I do I think that mother f'er dead, hell no. One thing I noticed about almost all superhero deaths in film that they all lay there dead with one bent knee abd one straight leg.
i think the deaths from ash is not permanent, but those killed in combat is permanent. but how will they resurrect gamora? sorry no spoilers, if you haven't seen war of infinity by now, then that's your fault.