Scott, the Meyer Land & Baillee (2010) is an updated on previous work on threshold concepts:
They describe learning firstly as substantial epistemic shifts, or shifts in conceptual content, clustered around their notion of key threshold concepts, which are transformative, integrative, irreversible, and troublesome. They emphasise the disruption that this entails, when common sense frameworks are overturned (transformative); hidden relations are exposed (integrative): irreversibly - you may reject the learning, but you can never erase the learning experience: previous ideas – and learning - may have to be discarded (in a process of decay and even grieving), all of which is, not surprisingly, often troublesome.
(from an article - still WIP - on emegence and transformation)
You have reminded me again - thank you - that "unravelling of the self is not an affordance for learning at all".
Learning can be a fragile business, indeed. The market place approach to xMOOCs just doesnt do it for me for precisely that reason.