The interviewers were professional and cordial. They seemed supportive. However I am notoriously bad at interviewing. I whiffed the easy questions they asked. About a week later I had another interview and took an offer to do almost exactly the same thing. I since heard from the recruiter the position was unfunded and I did not hear back because they were trying to pivot. Personally I am pleased with the outcome. I think the lesson here is you often have very little visibility into the mindset of the interviewers. Don't get discouraged, just move on.