> GitHub has been useful to store all repositories of the Dillo project, as well as to run the CI workflows for platforms in which I don't have a machine available (like Windows, Mac OS or some BSDs).

The post does not mention CI anywhere else, are they doing anything with it, keeping it on GitHub, or getting rid of it?

> Furthermore, the web frontend doesn't require JS, so I can use it from Dillo (I modified cgit CSS slightly to work well on Dillo).

That sounds like a bad approach to developing a Web browser, surely it would be better to make Dillo correctly work with the default cgit CSS (which is used by countless projects)?

No doubt this is desirable. However, adding all the CSS features required to support cgit may have been a lot more work than editing cgit's CSS. It's an attempt at avoiding yak shaving; adding recursive sub-projects that balloon a project's scope of work far beyond the original plan.

Dillo is actively developed, and the project of "migrate away from github" is complete, so now other work can be started and completed (like adding the CSS features required to support mainline cgit).