@PeteR, are you and Kelly back home from Israel? Either way, I pray for your safety.
Regardless of timing for Isaiah 4, the tide has already turned and is being accelerated not only by common culture that accepts different lifestyles, but multiple voices are growing w in Christian and Messianic circles speaking truth boldly... I think the dam is leaking heavily and a crashing wall of truth is coming.
I also
hope you're correct in your assessment, and my optimistic nature concludes that we will eventually be in the picture you're painting, but I disagree with your assessment of immanence. Within our own multiple closed circles, it may seem like the tide has turned, but if we're going to use that metaphor what is required is for the majority to be headed in our direction -- and that is very far from the case; the vast majority of people are not leaning toward acceptance of polygyny. The dam may be leaking, but as one fascinated by tangible dams to the point of having visited the under side of some of the largest ones on Earth I can assure you that
every dam is always leaking. This is true metaphorically as well as literally, and the general culture is still actually headed in the opposite direction of polygyny acceptance; in fact, proponents on our side probably missed the pragmatic window for jumping on the anything-goes bandwagon, because (a) we were too collectively concerned with signaling our disgust of alternative lifestyles over our willingness to promote polygyny, and (b) unlike exceptions-to-the-rule like you, most among us prefer to contemplate and pursue polygyny
in the deep recesses of the shadows.
Multiple voices may be growing within Christian and Messianic circles speaking truth boldly, but, primarily because of the timidity of the vast majority of those who see biblical truth in this matter, the mainstream culture neither hears nor would even pay attention to those "multiple voices," because they're not even as significant as a Who to Horton. Maybe I'm guilty of insufficient allegiance to my side in this matter, but I pay great attention to the actual cutting edges of mainstream culture, and the way it looks to me is that, absent a revolution among polygynists that asserts itself in the main right out in the open rather than only doing so in secret gatherings in unpublished locations, it appears to me that
backlash against polygyny is more likely than grand acceptance, because our culture remains predominantly gynocentric, and it continues to not sit well among mainstream young women that they have to share the top-tier
unmarried men they currently throw themselves at. Given the trend toward
avoiding marriage, I don't see any grounded, reasonable solution for those women who fantasize getting high value men all to themselves, but they're not even close to recognizing polygyny as an attractive alternative.
No amount of generally-timid (not that yours is that; far from it) promotion of polygyny is going to actually turn the tide. Teaching won't do it. Women writ large can't be logically talked into anything. They will only come around when they're no longer rewarded for being entirely selfish, and this will require something entirely distinct from intellectual persuasion. It will require the creation of absolute resolve among men in general to refrain from propping up the female delusion that they don't need no man.