Frankly, I don't blame the various license holders (both the movie and the comic) for modernizing it - nostalgia for the 80s (as opposed to nostalgia for certain 80s properties) a) is well past, and b) tended to be couched in good-natured mockery, and reducing Jem to a joke about the 80s would be doing it a disservice, and trying to do it (semi-)seriously in the 80s would guarantee it tanking.