I usually thank each interviewer after the interview. They say thanks for coming in and I say thanks for spending the time on me. Basic courtesy. But everywher

I usually thank each interviewer after the interview. They say thanks for coming in and I say thanks for spending the time on me. Basic courtesy. But everywhere I've interviewed at has used a loop of interviewers, so a thank-you note doesn't really make much sense unless I spam their loop... and that still doesn't make any sense.