This project is still going. it doesn't update as often as others but it has never been abandoned. There's a very recent dev log stating that after next update's hinterlands expansion, the update after that will continue the history from chapter 19. Argos has been confirmed as a potential guest to the hotel. But the old man might not be who you think it is. Still, Asterion should have been dead for thousands of years, becoming stone might just be the best outcome for him.