In my experience "agile" isn't really a thing, more an excuse or reason to not follow any rules at all. Devs get to play at building whatever they like, solving the problems that interest them in a haphazard way and leaving behind a trail of half-written, semi-functional code with little or no documentation to allow anyone to work with them. As soon as anyone suggests that there's a plan, or god-forbid, an objective or expected outcome from the invested money, everyone suddenly scream, "AGILE" and that, apparently, is enough to shutdown any and all detractors.

But then, try to suggest that there's a requirement that has changed or come to light and suddenly the "agile is open to new requirements" part of the approach is forgotten as the "progress" that's been made so far is too precious to change.

/rant