>>trollb+h6
A single 1920x1080 framebuffer (which is a low resolution monitor in 2025 IMO) is 2MB. Add any compositing into the mix for multi window displays and it literally doesn’t fit in memory.
>>maccar+P7
I had a 386 PC with 4MB of RAM when I was a kid, and it ran Windows 3.1 with a GUI, but that also had a VGA display at 640x480, and only 16-bit color (4 bits per pixel). So 153,600 bytes for the frame buffer.