And in the long term?
We envision 2.1 as our last major update of Factorio, and we will shift the focus onto long term support. So things like bug fixes, platform support/compatibility, modding features, etc. Other than that we feel we’ve reached a good place to conclude the active gameplay development.
Also yes definitely enemy mods. The factorio devs have always been very good about mods, even so much as creating their own mod manager and hosting, instead of using steam workshop