Unless you're interviewing at companies where everyone is expected to at least interview in a suit. I don't know what other areas are like but in Boston it seem

Unless you're interviewing at companies where everyone is expected to at least interview in a suit. I don't know what other areas are like but in Boston it seems like a 60/40 chance as to whether they want you to be dressed casual/business casual for the interview or want you in a full suit. its not just non technical people who expect the suit at time either. I've met at least a handful of engineers here who have said they straight up wont hire anyone who doesn't wear a suit to the interview.