The older games would have been the same 20 odd years ago to :) a few have appreciated 20 odd years on but there's a ton of boat anchors to. We will probably never see how the current games hold up in two decades time as pinball will most likely be a thing of the past, the next generation won't give two hoots about pinball.
More than likely but we are in a different era for pinball machines as well. 10 or 15 years ago there were no mods to bling the machines up, techs were very secretive about their tips, tricks and repairs - now we have the internet and things like the old Pinrepair Guides and Pin Wiki and forums to ask advice and learn how to repair things ourselves. We also have plenty of spare parts at somewhat reasonable prices and repro parts such as all of the ramps that pinball Inc has produced over the years. All this sort of stuff quickly de-valued a machine in the past when no-one knew how to fix them, parts were not available or were simply too expensive and the machines looked and played like crap.
As long as the manufacturers store the tooling for future use (the die to make the WH2O topper comes to mind), artwork files and the like, most of the machines in a HUO environment should live very long lives.
