Yes, this question is hugely relevant in my learning experiences, and has become a recent topic of discussion in our home and businesses. This question touches on several aspects, dimensions and axes of thought within learning itself, so I think we can leverage that fact to use it as an ideal brainstorming tool to discover and map out a corner of this massive problem space of "learning about learning, that we're exploring together.
This whole conversation of just-in-case vs. just-in-time seems to fall under a larger category of "What should I learn and when?" Those questions are MASSIVE in scope, and so I find your question, Bastien, really helps narrow this down a bit.
My thoughts on adult education is that it would ideally be paired with projects whose success relies heavily on the recently learned "core concepts" of a given curriculum item, such as a lesson or course, e.g. Writing Your First Program.
The just-in-time learning, on the one hand, feels like an ideal match for adults because we are often working on multiple projects anyway, so we are almost forced into this operating mode out of pure need. Is there a risk, though, that by constantly reacting to my current needs, I never get my head above water to see where it is that I'm trying to swim to, the really big picture that is?
The just-in-case learning, on the other hand, feels like it is often part of that larger vision, which is vital for adults too. But how sound is my vision when compared my actual future needs? Is my current path the best path for me? It seems true that diverse skills are not really wasted as our brains thrive on different patterns, relating one to another across several domains of study and practice. But it also seems true that time presses on me in the present moment, driving me toward efficiency and away from waste.
I want to feel like I'm going in a direction that is of my choosing and not being randomly chosen by my environment. But bills must be paid and we desire to serve those around us, so there's this pragmatic layer of reality on top of the whole thing.
Let me confess, I feel like I've wasted a ton of time on just-in-case, and that for me to progress more rapidly at this point, I need a fundamental shift into just-in-time, which is why my family and partners are talking about this topic so much lately.
I think this is why I'm so interested in the idea of curriculum paths that I mentioned in the talk. I don't want to derail the current conversation about this vital axis that Bastien has raised, so I'll open a new topic on that soon, but there are so many more touch points and intersects off of this one great question, which I look forward to exploring with you all. Thank you Bastien!