Definitely for it too!!!
Icon colors make the tabs very distinctive, and don’t require to “scan” through the tabs. The eye is immediately picking the right one with a glance, since these colors help to identify the type of an asset immediately, more so than icons! On ultra-wide screens and working with a lot of tabs, even more important.
I’m using the same type of “feature” with other IDEs too, where filetypes receive a specific color, because it really increases productivity.
UE5 skin made away with everything… looks clean, yes, making it similar to black-and-white TV is too much though.
One rule of great UX says: “Don’t change what people are trained on”. The colors have been an essential part of Unreal Assets for many and many years. The brain is trained to them. Changing this radically is a very bad UX decision.