Anyone done US customs with a Dutch husband/wife who doesn't have US citizenship?

I'm a US citizen marrying a Dutchie. Will that change anything for US airport customs?

NL is home for us. He's never lived in the US and we have no plans to move, so no green card or US passport for him. When we've gone to the States to visit my family in the past, we've usually just separated at customs, he's gone to the "all other passports" line to show his ESTA, and I've gone to the "US citizens" line.

But once we're married, will that change anything? Can he go in the US citizens line with me and show his ESTA and Dutch passport while I show my US passport, since we'll be travelling together as husband and wife? If so, do we need to bring our marriage certificate? So many questions, so few answers online.