All in all I think the end result will be the same. I don't think any of my Go code will survive long term.
Go has its warts but backwards compatibility isn’t one of them. The language is almost as durable as Perl.
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).
How many similar programs written in 1999 compiled without issue in 2007? The dependency and tooling environment is as robust as it's ever been.
Have we though? I feel the opposite it true. These days developers expect users of their modules and frameworks will be regularly updating those dependencies and doing so dynamically from the web.
While this is true for active code bases. You can quickly find stable but unmaintained code will eventually rot as its dependencies deprecate.
There aren't many languages out there where their wider ecosystem thinks about API-stability in terms of years.
As long as I have a stack of esp32s and a working C compiler, no one can take away my ability to make useful programs, including maintaining the compiler itself.