Interesting question R2F !
The media of course controls this and WHO controls the media ?
Right now primarily the right wing, conservative camp.
There is much alternative press worldwide but it's outside the 'mainstream' for the most part.
So the change seems like it will follow the other method of change. Slow, steady, until it suddenly reaches the oft named 'tipping point'.
Unfortunately it's not helpful that probably a majority of the people attempting a poly lifestyle are in the learning (relearning) phase and therefore are stumbling and bumbling along as best they can. The nay-sayers LOVE to have that for examples to support their cause.
probably take a generation or two.