And web applications, which remain completely unrestricted.

If you do it after you've established your competence, you'll get interrupted a lot by "witty" remarks.

If you do it at an interview or something, you'll get a lot of people questioning your competence and fit.

It's still not remotely the same as an actual dress code, which you will get in trouble for violating even after you've established your competence.

A good point.