Re: "Ethernet is so much better"
Nobody has yet mentioned Token Ring. The Big Blue alternative.
I remember it being also called "Broken Ring". Worked at a multi-media test lab at IBM many years back, and we had Macintosh machines (original series iMac, etc) that couldn't be networked because the building only had token ring.
Then way back at my first IT job, we had ARCnet. WAY cheaper than Ethernet (at the time), but a floppy disk taped to the back of a turtle would have had a faster transfer rate.