As someone that like to play piano and guitar - I could see this immediately as something to improve my skills and playing by ear

For me I was thinking a thought I almost never think and is long forgotten "where is that old home button in my browser so I can set this as my homepage, or maybe I have to solve 2-3 of these before I can log in to my computer" xD

"insubstantive" is a nice word - software that is modifiable by the user at run time - I guess like scripting "it's just throw away" or emacs bit of elisp and keyboard macro and move on "insubstantive"

Embrace the insubstantive! Otherwise - enjoy when you have a "problem" sitting down and having to abstract more and find the general and solve for "N" because the time investment was high and the tools did not allow for this sort of sketching, insubstantive, throwaway type thing.