I had 4 interview rounds with this company, and was told I was in the final round. There was only originally supposed to be 3 rounds to begin with. I thought everything went great, I was building rapport with the staff and my interviewers, on the final round the head of the department even jubilantly told me how much they liked me and thought I would do fantastic there. I followed up after the fact twice. The first time I was thanked and was told I would hear from the main interviewer. I didn't hear anything for a few days, and followed up again. Radio silence. Completely ghosted me. I put so much effort and so much time into the entire process (it took a month and a half to two months) that the least they could have done was just let me know that they went another direction. I'm not angry, it's just so disappointing.