My BS radar goes off when I get asked for a 2nd interview, or any 4 hour group interview. Thanks, but no thanks. They did you a favor.
These interviewers are crazy, and have zero proof their convoluted process produces better hires than a single 30 minute coffee interview. They just don't want to admit they don't know what they are doing. As if the heavens will open up and god himself will shout down "He's the one!", if they just have enough rounds to get there.
Maybe I'm doing my self a dis-service by not shooting for the moon. But I don't think so. I'd rather do real work than spend days reading upgrade notes. On-premises K8s time will come but for most that time is not now.
All tech companies run their own NIH stack in one way or another. If they aren't willing to admit that to themselves, there's not much I can do. It costs time to train to get new people up to speed... and given what kind of arduous journey learning OpenStack is, I figured they would have understood and went "Well you dont know K8N, but you're trainable in this stack.."
side story:
Yeah, I went through 3 stages of hiring with $company. Interviews went great, and then I hear back that I didn't show up to the 3rd (much to my surprise). When the HR person checked back in, they said it was an error and instead they were no longer interested in me because I lacked Kubernetes experience specifically.
And my resume includes Openstack and Apache Mesos. Not Kuber. But they dragged me around. Still pisses me off that they couldn't read my resume. Then again, their interview process was... shall we say, "interesting".