Every single insurance form and contract that two spouses sign would have to be changed. Every single form where you list a spouse. Come now, you work in IT. You know what changing forms does.

A same-sex marriage is still a marriage between two people. A poly marriage is not. It's different. There is no reason to distract from the issue at hand or muddy the waters.

It's different enough that it's a different issue. It's also an issue that I'm not particularly interesting in arguing at this time. I don't know enough of the facts to make an informed opinion, other than that some very vocal poly people that I know don't wish to make it an issue.