If it’s halachically acceptable, what’s stopping you (as in those that want it) from getting a second marriage?
Then again, the charmers who actually think they want two probably aren’t being that great husbands to the first. I’m not sure how exactly a guy is going to court a second wife. I wonder how that conversation would go when this maybe-soon-to-be fiance, calls the wife to ask if he’s good husband material.