[postfacto]

Yes, Agile does produce more buggy, less stable software. There is heavy bias towards doing only simplistic, user-visible things that fit in the span of two weeks. So all the foundational stuff you need to put in at the start of the project to let you support features while reliably turning direction on a dime? Can’t put it in there.

I’ve seen many agile shops fail to ever get CI/CD working because the effort just couldn’t find a place and a schedule on the backlog.