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
Linux kernel version 7.1 will drop support for 486: "Linux devs think even one second spent on 486 support is a second too many." https://arstechnica.com/gadgets/2026/04/linux-kernel-maintai...
Linux kernel maintainers are following through on removing Intel 486 support

Linux devs think even one second spent on 486 support is a second too many.

Ars Technica