Manga+Press 3.0 works with WordPress 5.0. Which, I figured it would because the plugin doesn’t use the editor at all.

However, it should be noted that’s for posting comics. More testing still needs to be done on the pages that modify the_content filter—specifically the Latest/Archive page functionality yet.

Scratch that out. The demo site is running WP 5.0.1, and the archive/latest comic pages are looking fine. I’ll wait for additional bug-reports, but from my end, Manga+Press works with WordPress 5.0.

At some point, I’ll update the plugin readme files to indicate that it does work with WordPress 5.0.