Kudos for this, what's your pitch for i3 users?
I guess the advantage over i3 would be that those desktop environments have better integration with certain apps and a coherent look and feel. For example, on Ubuntu, which uses a modified GNOME, you can add tiling while still enjoying stuff like the volume control widget, gnome-control-center, consistent file open dialogs, and so on.
For anyone who wants i3 but doesn't want to configure it, the only other option I know of was regolith:
https://regolith-desktop.com/ or https://regolith-linux.org/
This looks like a nice fit for my xfwm machine and I'm excited to try it.