please recall that 8bit color was the common capability for CRT displays at that time. Simple one bit display was also common. Any smooth transitions in gray or color had to use dithering, or be very clever in the way they chose the palate.

Certainly some historic credit goes to Motif, but, there are "levels to this game" .. Motif did not jump out as "wow that looks good" IMHO. Obviously NeXT was extreme in a different way.. sort of like a symphony orchestra more than an office machine.

It is genuinely entertaining to see people defend the dull and pedestrian UI in Windows 95.