Recruiter was very friendly and responsive at first. Then went for an in-person with the hiring manager. Felt like a good fit, a very positive experience and quite promising. Then after, complete silence. I know this happens a lot and people are busy but it's just good courtesy to at least respond to a candidate after putting them through the process to let them know you're hiring someone else even if it's just a one-sentence email to confirm. Better than ghosting them.