@YukonQuinn Welcome to the Serif Affinity forums   We are trying to get the current features rounded and finished first but I am sure that we will want to consider EPub formats and interactive PDF features before too long. We are trying not to overpromise on the release build, but the Affinity approach does add new features and improvements in free patches, so watch our for an Affinity Publisher roadmap that will make our direction clearer. No roadmap has been made public yet though, sorry.