Maybe I'm taking ths site name too literally, but I would think that computers, along with most electronics, are just one of those things that would never be a "buy it for life" purchase.

I actually do have a Casio calculator from High School (30+ years ago) that I still use, but no other computing devices that are more than 10 years old. Even if they still work, there just isn't much practical you can do with them.