[brigadier132]

Another commenter mentioned mobile devices getting constant security patches that make old software obsolete.

Also, software is not static. Do you really expect programs written today will work in 100 years?

[triceratops]

I don't expect programs written today to run on the latest hardware and operating systems 100 years from now. But a machine from today, or its equivalent emulated in software, running the same OS should always be able to run the same programs.