These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Dead Horse Genre: First, it was because video games were cheaper to maintain and took up less space at arcades. Later, as arcades died out, pinball machines all but disappeared. Of all the major pinball machine manufacturers such as Gottlieb, Bally, Williams, etc., only Stern Pinball remains today.
It could be argued that pinball has more of a Popularity Polynomial, as it is staging what appears to be somewhat of a revival in the last few years. Second-hand machine prices have surged. As an example, the value of Medieval Madness has gone from about $4,000-$5,000 in 2007 to over $7,000 in 2012. Also as of 2012, a competitor to Stern, Jersey Jack Pinball has sprouted up and is gearing up to release a Wizard of Oz pinball.