Arguments favoring new titles aside (and I too am in favor of this), it would likely be harder/more costly to reproduce some older titles, esp. in limited runs. Why? Because this would require sourcing and assembling the same parts and wiring and components that were in the original games. From what I've generally seen (admittedly lacking detailed knowledge), JJP has adopted some new component/assembly features to streamline production and reduce costs. They could do this because they started the design from scratch, so they weren't tied into an existing infrastructure. So, having to adhere to older designs (with how many miles of wire harness per game?) would be tougher than more costly than their current set-up. JJP has the JJP assembly line in place, not the old WMS/Bally/Stern ones.