I have a lot of little programs that are more or less finished: "does what it needs to do and there are no bugs". Some are public, some are not. I wrote them on

I have a lot of little programs that are more or less finished: "does what it needs to do and there are no bugs". Some are public, some are not. I wrote them once – sometimes years ago – and they still work fine today. I really like it that code I write today still works in five or ten years without mucking about to "keep up to date". "Don't upgrade things" isn't as easy as you say: how do you get an old version of Ruby? How do you get an old browser? Do you even want that? Opt-in should be easy and painless, probably even the default for new projects (through some build file or whatnot; I'm not very familiar with Java), but I think making existing projects work has a lot of value.