Wikimedia Foundation Sr. Data Scientist, Ecosystems interview questions

First interview was with the recruiter (who reached out to me); it was followed up with a hiring manager interview. Then, I was given a case study to do (which took about 4 hours). Following that, I was interviewed by two other members of the team about the case. The last interview was with three more team members about 'data communication' but went into specific technical areas as well, so it was a bit misleading. After 4 weeks of interviewing, I received a generic "Thanks, but we are passing" message from the recruiter without feedback. By far the most dragged out (unnecessarily) interview process I've ever participated in - with zero feedback.