This actively tries to clone the NeXT environment, which is what this screenshot is.
Nice :D 2023 & more relevant of an answer than I expected to hear!
My dream is for a modern, Wayland/HDR ready window manager based on Platinum or NextStep (I do use Windowmaker on a non gaming laptop but it looks mostly abandoned at this point).
Hell even...whatever Windows9x is called would work.
I know it’s just a joke, but I always saw this era of UI design as more inspired by concrete and stone than by metal.
Brutalist you mean?
Sure, that fits! Everything felt very solid and chiselled. There were a lot of stone textures on the early web in that same period, too.
We called it "battleship grey", back then.