"Every perception is to some degree an act of creation, and every act of memory is to some degree an act of imagination."
-- Gerald Edelman, Second Nature: Brain Science and Human Knowledge
9 How important is long-term memory, anyway？Distributed practiceHow important is long-term memory, anyway？Part II: Personal Memory Systems More BroadlyAugmenting Long-term Memory2020-09-24Journal
In other words, having more chunks memorized in some domain is somewhat like an effective boost to a person's IQ in that domain.
Okay, that's a speculative informal model. Regardless of whether it's correct, it does seem that internalizing high-level chunks is a crucial part of acquiring expertise. However, that doesn't then necessarily imply that the use of systems such as Anki will speed up acquisition of such chunks. It's merely an argument that long-term memory plays a crucial role in the acquisition of some types of expertise. Still, it seems plausible that regular use of systems such as Anki may speed up the acquisition of the high-level chunks used by experts\\ To determine this it would help to understand exactly how these chunks arise. That still seems to be poorly understood. I wouldn't be surprised if it involved considerable analysis and problem-solving, in addition to long-term memory.. And that those chunks are then at the heart of effective cognition, including our ability to understand, to problem solve, and to create.