When I was in college I didn't have my own computer so I relied on the Windows machines from the library.
That's when I discovered Slax and Puppy Linux [1] and all its different variants. Such a beautiful thing to boot into these pendrive distros and discover the world of Linux through them without altering the host system.
Good times.
I never ran Slackware Linux beyond that but the simplicity of being able to build a custom live USB through their web interface was amazing. I don’t think I’d have gotten as much of a head start with Linux had it not existed.
There's also Porteus, also a Slackware derivative offering KDE Plasma -- https://www.porteus.org
Slax was and still is a great live distribution. The fact that (at least one of its flavors) is based on Slackware shows that the parent distro (Slackware) isn't that hard to use, something that few people believe. Slackware is in fact very simple in comparison to other distros.
You should invest into a community run or community oriented distros like Arch, Gentoo, Alpine, Linux Mint etc.
More over, each distro has its things. Why should Slax do that?