I have a machine purchased in 1993 - a 1992 model - that STILL runs DOS 6/Windows 3.1.  An old (old) IBM PS/1 486 SX with DX co-processor upgrade.

The thing runs like a top.  They made machines a lot better back in those days - didn't know they'd be pushed to the back burner within a couple of quarters in favor of the next newer/faster/better machine.  Of all the machines I have the ones running Win3.1 and Windows 95 seem to be the most solid.  Less disposable.  They still do what they were intended to do.

I remember running a Persistance of Vision raytrace for hours only to find I had the camera in the wrong position.

Still have a shoebox of floppy disks in the backroom too ...