My last interview was in 2014, for a transfer within a big company from one metro area office to another. I had been on-site in my present office many times (still, mostly working from home), so I took the "dress like you would dress during a normal workday" advice - brand new sharp pair of dark blue jeans (solid - no holes or wear), long sleeve dress shirt, loafers. I already "had the job" within the company, everybody on the actual team I was to be transferring to loved me, but... the final interview was with my new Boss' Boss, and my to-be-new boss told me, "yeah, you're going to have to come back to see him, he'll flat out refuse to hire anybody who wears blue jeans to an interview."