LF:” +1
I think it’s important to add that there are many aspects to tznius, and while we may be better than they were in certain aspects of tznius, it seems to me that we may have a lot to learn from them in other aspects.
There are the technical halachos of covering knees, etc. but there is the other aspect of making sure the style is a tzniusdik style. That is also part of hilchos tznius, even though the Shulchan Aruch can’t possibly dileniate every possible style that might be invented.
My impression is that they excelled in the second aspect of tznius.
Of course, both are important and we should strive to dress tzniusly in both ways.