As far as I can see it is just Debian with LXDE, firefox ESR and some other packages preinstalled.

If they respect the license, you as a user can ask for the source code by e-mail.

But from my point of view, you can just install plain old Debian and all the same software and get a long term proven OS that will not randomly disappear and a huge userbase for support questions.

Based on your post I wouldn’t touch this distro with a 3 mile long bargepole.

I have never heard of WattOS but that sounds terrible.

It seems like antiX is a systemd-free Debian flavor.

If you want systemd, why not just use Debian? Or, if you are looking for a nice preconfigured DE/WM, any of a number of Debian/Ubuntu derivatives.

Mint for best out of the box setup, Pop!_OS for tiling, Zorin OS if you're looking for a funky styling, any of the Ubuntu derivatives for the major DEs: Kubuntu, Xubuntu, etc.

Sorry I can't help with additional info, as you said there's little to find. It's referenced on DW at least, but not much more is given there

A bloody discord FFS, I'm not going there.

But then I guess it's not open source, if we can't find the source.

I don't see myself installing a distro for which you can't even find the license? How do you even know you have the right to install or use it?

I found this in the forum that was linked on the planettwatt.com site. https://planetwatt.com/newforum/index.php?topic=1016.msg3100#msg3100

Didn't find any source code though.