If you are running an i486 CPU, you will want to read this. 

https://itsfoss.com/news/linux-kernel-i486-cpu-support-removal/

#linux

The Linux Kernel is Finally Letting Go of i486 CPU Support

The support remained in the Linux kernel all these years after every other major platform dropped it.

It's FOSS

Retired my last i486 in 2016.

Or: it kind of retired itself...

Bought in 1998 from a friend who bought it new in 1996, replaced win95 (or 98) that was on it when I bought it, with SuSE linux.

When SuSE failed to update it ran for a while using floppyfw (created by a friend of mine)

In 2001, I put a debian netinstall floppy into the floppy disk drive and installed debian and ran "apt dist-upgrade" from 2001 to 2016 when the HW finally failed.