I've known quite a few couples who have done it temporarily, for work or family reasons, but none that chose to do so permanently. I think strong relationships can withstand a lot, and I totally understand why Mom might stay behind with the kids if Dad's job relocates him halfway through the kids' high school years (that's happened to two friends of mine) or if one parent is military and deployed or if someone needs to spent a period of time taking care of an ill parent in a distant city or whatever.
One of DD's friends has parents who work on different sides of the border - we live in a border town, Canada is about 10 minutes away - and for most of their marriage they've made that work. His mom is a teacher here, his dad is a scientist there, and they just go back and forth. They did live together, until covid, but for the last two years they each lived where they work. I think the whole family was together all of twice in the whole time the border was closed, because although the mom and son have dual citizenship and can go back and forth, the quarantines were time/cost prohibitive. But since neither was willing/able to quit work to stay on the other side, and since the mother also does some caregiving for her own mother on weekends (also on this side of the border), it really was their only choice.