Link글을 읽고 알아서 판단해 보시죠.
https://www.cnbc.com/2019/04/30/do-i-have-to-send-a-thank-you-note-after-a-job-interview.html
Are post-interview thank-you notes still a thing?
https://www.careerbuilder.com/advice/are-postinterview-thankyou-notes-still-a-thing
Should you send a thank-you after an interview?
https://www.monster.com/career-advice/article/interview-thank-you-letter-send-or-not