That seems by design more than anything. Outside of iOS, plenty of software doesn't become obsolete in ten or twenty years. Even on the Mac itself, you still have all the classic Unix utilities. Will grep ever become obsolete? People are still using vi/m after 42 years despite all manners of new text editors and IDEs popping up.
When it comes to hardware (which is probably what Steve was most concerned about), there's still plenty of electronics that can stand the test of time. I'd say the IBM Model M will be admired and looked at in astonishment for centuries - no modern keyboard has managed to make it obsolete it in the last 35 years.
If there's Amigas running infrastructure and DOS boxes still working in the wild, I'd wager there's still some shop somewhere using an Apple II as part of its inventory system.
When it comes to hardware (which is probably what Steve was most concerned about), there's still plenty of electronics that can stand the test of time. I'd say the IBM Model M will be admired and looked at in astonishment for centuries - no modern keyboard has managed to make it obsolete it in the last 35 years.
If there's Amigas running infrastructure and DOS boxes still working in the wild, I'd wager there's still some shop somewhere using an Apple II as part of its inventory system.