By all means, it is not expected (and don't expect it to change the outcome!), but it can't hurt. I think it's always nice to thank them for their time + helps to create a good impression. If they've taken the time to review candidates for hours on end, then the few seconds taken to read a tiny email is a drop in the ocean.Do people send thank you emails after interviews (specifically ACs with partners)?
Not sure whether to or not?