Comment by hnlmorg

Except 8 years is impressive by modern standards. These days, most popular ecosystems have breaking changes that would cause even just 2-year-old code bases to fail to compile. It's shit and I hate it. But that's one of the reasons I favour Go and Perl -- I know my code will continue to compile with very little maintenance years later.

Plus 8 years was just an example, not the furthest back Go will support. I've just pulled a project I'd written against Go 1.0 (the literal first release of Golang). It's 16 years old now, uses C interop too (so not a trivial Go program), and I've not touched the code in the years since. It compiled without any issues.

Go is one of the very few programming languages that has an official backwards compatibility guarantee. This does lead to some issues of its own (eg some implementations of new features have been somewhat less elegant because the Go team favoured an approach that didn't introduce changes to the existing syntax).