I agree, and would say that the influences of the Edwardians are also often overlooked. In many ways, what we like about the 30s and 40s are really just extensions of what was being innovated during the Edwardian and Jazz ages. I would also say that this time period is the earliest time period in which one can dress "period correct" and still be reasonably modern enough not to be wearing a costume. Victorian and earlier fashions are so far removed from the current ones that they normally cannot be worn except as costume. Some of the Edwardian styles are that way as well, but by the 1920s most of the "modern" styles had evolved and thus they can still be worn today without too much attention given to them.