I am old and thankfully out of the getting hired game. I was cleaning out some files (paper!) recently and ran across correspondence from old job searches. As you said, single visit and decision. I was also struck by the number of letters from companies thanking me for my resume and politely telling me they were passing but would keep me in mind for future openings. It was not uncommon to receive a letter directly from the hiring manager thanking me for coming to an interview.