- Avoid breaking changes
- Keep APIs stable
- Test and document everything, etc.
I personally think there's nothing wrong with that. We wouldn't say that a musician is *obligated* to put out a second album or a remaster. We wouldn't say that an author *must* make a sequel to their popular book. But when it comes to code sometimes we feel like the original author has an obligation to keep working on it just because it would convenience us.
(edited for formatting)
If you did want your software project to run the same as today when compiled/interpreted 10 years from now, what would you have to reach for to make it 'rot-resistant'?
I think the best defence is to choose a platform that has longevity, like x86 Linux, and then seriously limit dependencies beyond the platform to the point of maybe not having any extra dependencies.
The problem is eventually platforms change too. The longest lasting platform for software ever created is x86 + BIOS which lasted from 1981 to 2020 when Intel officially deprecated BIOS.