SJS, The reason I brought up poligamy was not about how HOW the the application of halachos to our daily lives changed, but the fact that they DID change (we can blog here all day and night if we were to analyze the origin of each minhug of each community in klal Yisroel) and therefore how our ancestors in the midbar applied the halachos to their daily life is different than we do today, 500 years ago and even 100 years ago. We need to follow daas Yehadus and minhugim that is practiced today.
Minhugim for me is not the same as for others in my community (not talking about family and Chassidus, but rather neighbors and freinds) and yet the daas Yehadus is the same for us and we are therefore obligated to follow that.
Daas Yehadus is disdinct for different communities and some don’t accept others opinion of daas Yehadus as being valid or accepted.
I’m not saying what my feelings are regarding socks or stockings I’m just saying talking about the facts.