Hi David.

The situation is not a clear one. First of all, the Agile movement began before the Agile Manifesto. I recall well when I allowed my teams to start using eXtreme Programming in 2000. XP was all the rage. The next year the Agile Manifesto was written, largely because of the momentum that XP had created. From then on the movement became known as the Agile movement, even though it began before the Agile Manifesto.

You are right that ideas that exist within and among the Agile movement are not all dead. It is the movement itself that is in decline. That decline is manifested by the waning interest of companies that had previously looked to Agile frameworks as a solution to some of those companies' problems.