I'll also add that the hardcover omnibus is really only a Marvel/DC format, so don't hold out hope for something like Paper Girls to be collected like that. At best, some creators will have the resources and capital to have a deluxe hardcover or two made for their independent titles, like I Hate Fairyland and Descender at Image. Or IDW has printed deluxe edition collections for their recent Teenage Mutant Ninja Turtles series. That one for example is around 9 volumes so far, but I seriously doubt there will ever be an omnibus hardcover edition beyond that.