Intel 486 CPU announced April 10, 1989

The killer app for the 486 didn't come out until a year or so later

The Silicon Underground

The 486 and https://www.delorie.com/djgpp/history.html changed everything.

Suddenly, it was possible to imagine running advanced software on a PC, and not have to spend 25,000 USD on a workstation.

The history of djgpp

Amazing to see a webpage "Updated Dec 1998" still up, running and displaying correctly.
Without fancy JS or CSS, sites can last decades easily
With JS and CSS sites can last decades easily.