schwabing Is there maybe someone you can recommend for a paid migration?
Yup, @luceos has you covered. I do think you could use the existing
src/Source/* packages as a model and probably move a basic set of discussions, posts, users, and categories over fairly quickly if you have a PHP engineer handy. It's all the other stuff that usually gets more complicated. Unfortuantely I'm not able to assist with custom / bespoke forums, there's just too damn many even limiting it to the distributed ones. 😅