Go into any used bike store and you'll find nothing but mixtes. They are slow sellers, and plentiful. There definitely is still something of a chauvinistic attitude towards them. And women cyclists on average are still less plentiful than men, and they too sometimes choose a "men's" bike too. Most men still refuse to ride a mixte even today.

It's too bad, because mixtes are often a great deal. I've eyed a few cool looking ones in the past but never got around to buying one because of budget.