What about using a supported version of Publisher (standalone) on Windows in a VM?

I thought about doing this, combining it with Win 10 Enterprise IOT, but in the end it’s delaying the inevitable. I’m migrating away from Microsoft Office and Windows in general because Linux is an easy sell when most activity is done through a browser anyway.

I think Scribus is a suitable replacement for Publisher? I don’t think it’s any worse but I don’t think it’s at the level where it can compete against InDesign and Quark. However the major upside is that it is open source and runs on Linux just fine.