There Will Never Be an Agile 2.0...
...for the simple reason there was never an "Agile 1.0."
Claiming to have crafted "Agile 2.0" would be like publishing the "Declaration of Independence 2.0" or "The Laws of Thermodynamics 2.0." The Agile Manifesto is foundational. It is a statement of first principles that underpin a mindset from which a mountain of tools, techniques, frameworks, and practices have been created.
As to methods, there may be a million and then some, but principles are few. The man who grasps principles can successfully select his own methods. The man who tries methods, ignoring principles, is sure to have trouble. - Harrington Emerson
As a tool, its utility comes from providing a stable base from which we can clarify complicated problems. Much of the 2.0 stuff I've read adds complexity and complication to a simple set of values and principles. In this regard it reflects research that shows people are more likely to add to solutions rather than subtract.
It's this notion of a stable base that flummoxes people seeking to assign versions to Agile. First principles are often unassuming, their beauty and brilliance is masked by their seemingly simple codification of how things best work. Neither are first principles about absolute truths. First principles can have first principles. The first principles by which I use a wood plane are different from the first principles used by the tool manufacturer when milling the steel for the blade. My first principles of use inherit and extend the manufacture's first principles of milling steel.
The Agile Manifesto identified elements in software development that are non-reducible. To be clear, there are other first principle elements not included in the Agile Manifesto and the Agile Manifesto doesn't apply to every conceivable context. Twenty years of experience of applying it's four values and twelve principles to other areas of business have revealed this to be true. They are not, nor will they ever be, an absolute truth. As our understanding of why they work so well improves, so will the underlying principles. Frankly, I'm impressed they have held up this well this far into the Internet Age. And I certainly don't expect them to withstand every challenge or be as durable as the Declaration of Independence of the Laws of Thermodynamics.
So when I read someone's declaration of "Agile 2.0," the first thing I want to know is if their proposal precedes the first principles established by the Agile Manifesto or are they trying to do something else. So far, it's always been the something else. There may be some interesting thoughts related to an alternate framework or perhaps a change to common practices, but I’ve yet to see anything revolutionary or even evolutionary.
A second thing I look for: Is the author working to falsify any of the principles and have they done a good job of presenting their argument. Again, this hasn't happened. Mostly I read a lot of complaints about wording or ambiguity or history or stuff that is little more than efforts to tag the foundation with a personal style of graffiti.
I’ve yet to see Agile’s next evolutionary phase. I hope someday I will.