I recently asked this question to get some general consensus on an answer, as I had been thinking about this question for the last few days. However, it was closed because someone didn't "truly believe anyone is really considering this." I was however considering doing this, as dressing nicely helps give me a confidence boost for interviews, and after watching a Ted Talk on how body language and posture can help give you more confidence and help you succeed in interviews, I was wondering if it would be okay to wear a tuxedo for the added boost in confidence it gives me while wearing it. If the answer to the question is "No." that's completely fine by me. I just would like an answer and an explanation.
Now, it's obvious that some people are not taking this question seriously from the mocking comments and answers stating things to the effect of "you can point out that you have never heard whether or not wearing pajamas would be considered inappropriate or not and as about that", however asking if wearing pajamas is okay is non sequitur. Tuxedos are considered formal wear, pajamas are considered sleepwear. I don't see why asking if wearing a tuxedo (formal wear) is okay is outrageous in a setting where you typically wear other formal wear. If I was asking about wearing bathing suits, pajamas, clown suits, etc, then I can see why people would think that was outrageous.
Update: it was reopened, but now has been closed as primarily opinion based. I don't see how it is primarily opinion based as there are expected norms for dressing for interviews. It could be a little subjective, but not anymore so than the question I linked in my own question. It and a number of other questions here could be considered opinion based, but can be answered by experts' experience.