My answer is no, I don’t think it has aged. But now you’ve made me want to read the book again. And I’m interested in reading about how others view it.
I do think the examples of possible implementations that David Allen used in the book and in his talks have aged in places, but I don’t believe the foundations of the methodology have aged at all.
Contexts
He includes context as one of four primary factors to use when deciding what action to do next at any given moment. You don’t have to look very hard to find people talking about how communications technology has taken a lot of the value out of using contexts in any meaningful way. That’s true for me. I find that the Agenda context is the only one that has any real value in my system these days, but I’ll bet it wouldn’t take much effort to find a way to ditch that context and find a different way to make sure I get those actions done.
But I also don’t think not using contexts is a significant deviation from the methodology. The other three factors he lists are time available, energy available, and priority. Those don’t age. They made sense for thousands of years before context mattered, and they have outlived context as a useful factor.
Everyone still has to consider and abide by those other three factors when deciding what to do next, even if they don’t know that they’re doing so. You don’t have to practice GTD to know when you don’t have enough time to finish something, when you can’t think straight, or when you need to consider which thing will get you fired if you don’t get it moving right now. GTD just gives you a tool for being honest with yourself about how to consider that mix to decide where to direct your attention in the moment.
Also it was pretty obvious that Allen’s own implementation was tailored heavily toward a job that requires a lot of travel, at a time when contexts mattered a lot. But I know that was never a need that I had, and I had (and continue to have) no difficulty using his methodology to manage a largely travel-free existence.
Deciding what to do next
When I look at the workflow chart, which I consider the spine of the methodology, I don’t see anything dated in there. It’s just a way of making decisions about managing sources of input and then processing inputs into actions, reference material, or trash. That’s still relevant and universal, regardless of what form the input takes, what tool you use to process it, or what form your reference material takes.
(I just thumbed through my print copy of the 2001 edition very quickly and found at least four instances of that flowchart — just the exact same full-page diagram, repeated in multiple places in the book so that you always have it handy. That tells me that the author also believes that that flowchart is essential to the methodology.)
People sometimes say that the details of their job or their life are such that that flowchart doesn’t apply to what they do, but I’ve never heard or read a convincing case for this. It may not help you to know that you run your decisions through a flowchart every day, and you may not care to know what the flowchart looks like. But we all do it. Our internal flowchart may often look like a bowl of spaghetti, but ultimately, we’re using some kind of a flowchart. Allen just gave those of us who care about understanding such things a general and standardized way of understanding it so that we can try to repeat it reliably.
That doesn’t mean that if you use GTD you have to include an action for every single thing you ever decide to do in work or in life. (Put toothpaste on brush. Move brush over teeth vigorously. Spit.) But I think people often assume that. The methodology is generalizable enough to allow you to decide what you break down into actions and what you can trust yourself to remember to do.
And this is a difficult point to agree on for many, which I think is understandable. When I started using GTD, I had to make quite a few mistakes about what to include before I understood just how customizable it is and how much I could leave out. Some things just need to be experienced before they make complete sense.
Weekly review
He describes the weekly review as “whatever you need to do to get your head empty again” (emphasis mine). He gives an example list of what to consider in your review and uses a weekly frequency as a good starting point, but as always, he’s not telling you that you have to do it that way, and he’s absolutely not telling you which app you should use to do it. He’s suggesting a framework, based on what he believes works. And, from my experience, he knew what he was talking about: If you’re not reviewing your inventory of your commitments in a thoughtful way on some regular basis, you’re not being honest with yourself about where you stand on anything or what you can reasonably expect to add and accomplish. None of that feels aged to me.
One next action
I don’t recall a “one next action” rule/recommendation and couldn’t find anything in the book. Does that mean you should never plan more than one action ahead on any project, or does it mean something else? If it’s the former, I’ve never followed that rule.