[Liftyee]

I'd reasonably expect software to run forever insofar as the environment it's run in doesn't change. Essentially, no OS or dependency updates - network is inevitably going to get broken.

Anecdata: My Wii (2006) console has had a few hardware issues I've fixed, but the software is just as responsive as a decade ago (though many external networks/servers have shut down). Homebrew community is very much alive and has expanded its utility.

[banbangtuth]

I was thinking to defer to the compiler to make things stable. i.e, Go or JavaScript virtual machine should just run forever and able to decide with OS updates.

On the frontend world, the browser so far has been super reliable in maintaining backwards compatibility of HTML, CSS and JS for years and years.

[mjevans]

Unix shell script also more or less reached a stable state. It's even optional to target Bash rather than just shell.