One of the biggest reasons that SRS has not become popular in creative domains (math, art, science, business, writing, startups...) is that there is very little social proof. People are not able to go online and easily find people who have been successful at applying spaced repetition to a creative domain.
I know with certainty that there are people using SRS to do creative, inspiring things because I interact with them and talk to them every day in the SuperMemo.Wiki Discord! But none of them share what they do publicly.
My "Learning in Public" project intends to encourage those wonderful and talented people to quit hoarding all of their nuggets! Work with the garage door up! Share your knowledge, experiences and expertise with the world!