Graphical User Interface - GUI or UI.
However, back here on planet earth, in the day to day use of some of our favorite applications - gradual change is required to maintain familiarity and NOT loose ( annoy ) an established user base.
There has been unquestionable increase in the sophistication and complexity of Adobe Illustrator over the years - but the user interface has a clear and familiar = approachable "Look & Feel".
Adobe Illustrator TOOL palette over 30 years.
Perhaps apocryphal story telling - " there was this crazy eastern European guy working on algorithms for many years with this guy from Taiwan " - this evolutionary journey of the tools reveals that a LOT of work has already gone into the DIGITAL TOOLS we use to day.
EVERY software application going forward will use AI & ML to make them even more powerful. Pay attention to how nuanced some of these topics are - lovingly crafted by designers.
Enjoy this 8 min video on the evolution on the evolution of Photoshop. Click on the image or the link below.
https://www.youtube.com/watch?v=kcF1899Dy7c