There's an interesting trend in GUI design, where systems fluctuate between simplicity and complexity.
It seems thing naturally become more complex to meet user's requirements, this is pleasing at first. When things have gone too far people see simplicity as a better way to unify the system.
This has also happened on the macro scale as an industry trend in Web design. From the diverse designs of the 2000's to the simplified bootstrap era of 2010's. Material design then brought back some diversity with many more colors and shadow options, but it seems design systems like Slack Kit and [1] ant.design (which have less colours and no shadows) are swinging the pendulum back from complexity to simplicity...
I suppose design is cyclical in a way