Quoted from chadderack:This is what killed off arcade machines (or part of the reason, anyway) IMO. Buy-ins/continues, easier games, cheats. (Game consoles took a chunk, too.) Same principle with pinball machines. No challenge, no replay value.
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Buy-ins/continues make arcade games less fun in the home environment, but for coin-op it totally makes sense. You want people to keep pumping quarters in to keep going. It definitely caused a split in design theories between arcade and console games...when the two had been the same for so long. Arcade games became quick rushes - fighting, driving, shooting. Consoles moved more toward larger narratives and huge worlds.
As for pinball, it absolutely made business sense for games like STTNG & Road Show to add a continue button. Keep the location player pumping in quarters to "see the end". I'm surprised Stern never did it, especially with super lengthy deep rules games like LOTR and TSPP. I'm surprised Jack didn't do it with WOZ due to depth and for operators (maybe there's a setting? I dunno). If Hobbit is another super lengthy quest game like LOTR - I say, bring on the buy-in! Don't like it, don't use it.