The kind of situation you're talking about is not the situation we're currently in. If the previous page had been released yesterday, and people were asking about the next page, you'd have a point, but that's not the case.
It's been 19 months. It's been so long since the previous page was released that the domain that the comic was being posted on (dashacademycomic.com) has expired. It's perfectly reasonable to ask if the comic will ever be continued or if it's been abandoned.