If retro consoles are anything like pinball machines, I think it's safe to say that hobbyists will be able to keep them working for decades to come. There are pinball machines from the 40's that can still be played thanks to devoted hobbyists restoring them. In pinball, there are also tons of replacement parts being produced and sold, and I'm sure retro consoles will also start receiving more reproduction and replacement parts as the need for them increases. This article is pretty doom and gloom, but being a part of the pinball community has shown me that most things can be kept working far longer than they were ever meant to by anyone with the passion to do so.