Go back to the late 80s/early 90s and small System 7 UNIX clones like Mark Williams Company's Coherent 3.2 could install, complete with their entire userland, d

Go back to the late 80s/early 90s and small System 7 UNIX clones like Mark Williams Company's Coherent 3.2 could install, complete with their entire userland, dev sys, docs, and formatters in around 10Mb of disk space and run on a 286 with 640Kb of RAM. No TCP/IP stack (it used UUCP for comms) and no X11, but if you fast-forward to 1992 you could have Coherent 4, with TCP/IP and X11, running on a 386 with 4Mb of RAM and installed in 20Mb of disk. Even the mammoth (by the standards of the day) SCO Open Desktop 3.0, with X11/Motif and a bagload of other stuff, could install in less than 200Mb of disk space and run reasonably smoothly on a 386/33 with 16Mb of RAM. That was a full-blown workstation grade UNIX distribution with all the trimmings. These days word processors are bigger.