This is from 2015. Hardly news. Also, there's already a program that simulates realistic color mixing: https://github.com/scrtwpns/mixbox
So far the only painting software I know that incorporate it is Rebelle 5.
It’s odd to me to criticize an old article using the existence of newer software as your point. I thought this was an interesting read.
Says "last updated May 28, 2021". Also has a year tag in the title.