Microsoft Principal Software Engineer interview questions

started in September, ended in December; unbelievably long period(s) of silence without any update (in between). Hiring Manager joined an interview process as a LAST person (expected first?) who actually told me that I don't have experience he is is looking for. LAST (!) person in the interview. Technical questions looked like interviewers didn't really have any correct answer, but just tried to solve their own work problems collecting fresh ideas from candidates. No one was able to formulate a whole task, changing the initial conditions and requirements during the interview few times.