I'm enamored of this idea as well and this is a fascinating example.

It seems similar to the related (and also difficult-to-name) concept which I've called combinatorial creativity. One of the earliest versions I've seen is that of Raymond Llullus' work with respect to combinatorial mnemonics described in Frances Yates' The Art of Memory (1966). Farnam Street's post is a good start https://fs.blog/networked-knowledge-and-combinatorial-creativity/, but I've been collecting other examples: https://hypothes.is/users/chrisaldrich?q=tag%3A%22combinatorial+creativity%22 and other names for it over time.

I can't help but wonder what Ericsson's role of deliberate practice would look like with arts as the subject? What motivates long term deliberate practice?

Yates, Frances A. The Art of Memory. 1966. Reprint, Chicago, IL: University of Chicago Press, 2001. https://www.amazon.com/Art-Memory-Frances-Yates/dp/0226950018.

Ericsson, K. Anders, Ralf Th. Krampe, and Clemens Tesch-Romer. The Role of Deliberate Practice in the Acquisition of Expert Performance. Psychological Review, 1993.

Marshall Kirkpatrick describes a method of taking three ostensibly random ideas and attempting to view each from the others' perspectives as a way to create new ideas by linking them together.

This method is quite similar to that of Raymond Llull as described in Frances Yate's The Art of Memory (UChicago Press, 1966), though there Llull was memorizing and combinatorially permuting 20 or more ideas at a time. It's also quite similar to the sort of meditative practice found in the lectio divina, though there ideas are generally limited to religious ones for contemplation.

https://content.blubrry.com/thrivingonoverload/THRIVING_013_Marshall_Kirkpatrick.mp3#t=1559,1745

Other examples: - https://hypothes.is/users/chrisaldrich?q=%22combinatorial+creativity%22 - https://hypothes.is/users/chrisaldrich?q=%22Llullan%20combinatorial%20arts%22