I noticed Melania waved to the Carters. She seemed to snub the Clintons though. The Trumps really were the guests everyone dreaded.
I think the Carters are overlooked generally. They are both in their 90s and have been married nearly as long as the Bushes. They also have been very ill. Carter is still active when he sees something he believes in. And does a huge amount for people who are less fortunate. I saw it mentioned that they were probably the last true Christians in the WH. Serving and then living modestly and quietly doing good.
As an aside, on MSNBC Chris Matthews kept trying to create controversy about a feud between HRC and Jimmy Carter. They were pointedly sitting a distance from each other and not speaking, he said more than once. Except ... there is footage of them having a conversation and a chuckle about something and the Carters were sitting on chairs at the end of the row and not in the pew.
I found the ceremonies this week to be very moving and food for the soul. Hugely helpful in a week when UK politicians seem hell bent on pushing us off the cliff.