>>13213It's not so much about what they could do compared to new GUIs, it's what they were trying to be. Consistent, with integrated applications, and rigid structure. Proprietary systems targeting expensive hardware.
These days, discounting Apple, unix GUI development is universally open source, and carries with it all the design philosophies of open source. Customizable, single function, "lightweight". Everybody is supposed to put together their own system, and so there's no standard complete system.
KDE is sort of trying to be that, but it's soykaf .