Amazing that you still can do this with Linux.
"[Krzysztof Krystian Jankowski] dropped Floppinux, a live Linux OS that boots from just a single floppy. [...] Every component of Floppinux is pulled directly from the cutting edge, including version 5.13.0-rc2 of the Linux kernel which is literally just a few days old."
https://hackaday.com/2021/05/24/running-modern-linux-from-a-single-floppy-disk/