A couple of years after this video my brother and I bought 10 base 2 (coax!) ethernet cards so we could play multiplayer games against one another in our adjacent bedrooms. Our dad's computer in the basement was the only one in the house with a modem.
I remember us spending an extra several hundred dollars to go from 4 MB of ram to 6 MB of ram on our 386 SX 25 in the early 90s (which had a 20 MB hard drive).