I played around with DSL a lot back in 2009 or so, it ran great on old PCs I salvaged from the garbage.

> Hats off to Puppy Linux for staying one of the few that still offer a full desktop environment in a small size.

Don't forget SliTaz too, it's still tiny:

> Root filesystem taking up about 100 MB and ISO image of less than 40 MB.

https://www.slitaz.org/en/about/