C is also half a century old. Perhaps Valgrind wasn't a high priority because the newer language also has newer tools?

Nothing wrong with adding tried and tested tools later if people want them.

Did you have a need for Valgrind in Go that wasn't served by any other tools until now?

> Next up: maybe Go will discover gdb integration and we can debug like it's 1999

That's already possible and documented[1]. I don't understand if you're sarcastic though, what's wrong with GDB? I use it in vim :termdebug and I wish all languages had native support for it.

[1]: https://go.dev/doc/gdb

And yet it's mature enough to be used for highly critical software such as Kubernetes...

Good enough to be used by every major cloud provider, every time you download Google Chrome, and Android SDKs you pull from a standard library Go based HTTP server.

How do you know the Chrome downloads server specifically is written in Go?