Thanks for the novel. ;)
Steam will get the remaining new Seasons as soon as they're completed (they'll likely twelve episodes each). The completed version will also be available on Patreon and SubscribeStar, where the game is released on an episode-by-episode basis. Saves made any either version should be interchangeable, as they can be loaded on any platform (Windows, macOS, Linux and Android).
Hope that clarifies things!