Go, similar to Rust, has a horrible ecosystem, IMHO. I want to like it, but they already broke backwards compatibility with older systems (try to get the Go compiler running on a slightly older OS X, f.ex.), and for a compiler that's a no-go to me.
I regret to inform you, but the post was not about maintaining old systems, it was about simplicity in creating services using a language purpose-designed for creating services. The modern underlying os/docker image was kind of a baked-in assumption.
The post was about Go and uses the "The boring choice is the right choice." point at the end. But a compiler that's so quick to abandoned previously perfectly fine supported systems, and basically is bleeding edge, is anything but the "boring right choice". I personally prefer long term stability in the toolchains I use for my projects at least.
Isn't that the same thing that Homebrew does? It only has CI for the last couple of Mac OS X versions. Seems like this is more of an issue with Mac OS X architecture than Go.
Dunno about Homebrew (haven't used that since many years for various reasons), but Apple is certainly pushing things in a way that makes 3rd party developers quickly abandon old systems too. That's true. At least lots of 3rd party developers are very quick to give up if their new Xcode will not cooperate.