> It seems utterly insane that in the early 90's I could just run Windows 3.1 on a bit of kit that in all likelihood wouldn't even power a toaster today, and the experience was, well, frictionless. I don't recall ever thinking "wtf is this thing doing?" ...
I generally agree, but I sometimes ran Windows 3.0 on a 386SX-16 in the early 90s, and often wondered why it ran so slow on my admittedly underpowered but supported system.
At some point I read (perhaps in Compute! or BYTE) that Windows made something like 20 or 30 syscalls to draw one line of a window's border. That seemed exceptionally inefficient to me, so I stopped using Windows. I generally worked in DOS, but if I wanted a GUI, Geoworks provided an experience at least ten times better (subjectively) -- smooth UI, ability to multitask, a surprisingly good word processor and other well-designed software included.