I've been on the other side of a hiring process like that.

It literally went like this:

"Oh shit, didn't we interview so and so for that like 3 weeks ago? Oops! Are they still available?"

I had a 4 month hiring process - but in fairness they were very transparent. Early on in the process I was warned it would take a long time, and at each step along the way it was made clear what was happening. There was never a feeling of being half ghosted.

Wasn’t a bad experience at all.

I got a new job long before COVID--so mostly in-person process--and it was about a 3 month process. But a lot of it was I was interviewing with people who traveled a lot and getting on calendars even with flexibility on my part (I was very local) just took time.