Must job seekers (but certainly not all) have this part of the interview process nailed. Firm hand shake, smile on your face, dressed for success.
The 21st century interview process has moved way beyond that now. Showing up dressed for success, and answering some traditional questions fairly adequately doesn’t work as well anymore.
Your job is to surprise and delight, and to change the agenda. Your job is to reset expectations and make the interviewer delighted that you could be part of the team (assuming the interviewer is the decision-maker).
Showing up is overrated. Necessary, but not nearly sufficient.