Earlier quoted context omitted.
‘Serial polygamy’ means a sequence of multiple simultaneous relationships. You mean serial monogamy.
I meant it as an electrical engineering metaphor, where you can string devices in parallel, or in serial one after the other, but where with a few adaptations both can lead to the same practical result. Besides, my whole point is that this behavior constitutes a variant of polygamy, not a variant of monogamy, so I stand by that term. That there's a "serial monogamy" idiom describing it (I just discovered it thanks to…
If I had a spouse, to whom I was devoted, and they were hit by a bus and killed, and then I had another spouse, who was killed by a falling meteoroid, and then a third spouse, who died of an aneurysm, and finally a fourth who left me because of a reasonable fear of death-by-misfortune--I would still be considered monogamous.
Yours is a very tortured interpretation of what polygamy is.