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I'm working on building computers designed to last longer than 50 years. They are primarily for the sort of timeless applications mentioned in the article. It's hard to imagine what people will be doing 50 years in the future, but it's not so difficult to see what people were doing 50 years ago that they're still doing today.

Transferring data off the computers won't be a problem in the future, if people are still interested there will be adapters and interface modules available, or you can make your own because of the open-source hardware, software and documentation. The software won't need to be updated because it won't need to run the latest version of everything.

There will be some advantages to using simpler and less capable computers for certain tasks, but most people will still need a modern computer for doing things like paying taxes and viewing advertisements.