However modern languages have a lot of trade offs in deployment strategies that are just easier to say by stating the language.
Golang is normally fully statically compiled so getting this tool on a host requires nothing other than coping the completed binary. It often requires nothing at all from the system it is running on. This is an implied feature of the language.
C/C++ code can be that simple, but static binaries are not always possible. And then you require the libaries on the remote machine.
There is a good chance Python will be on a remote machine, but deployment could be complicated. Psql support requires the the libaries to be on that machine for example.
And if the tool was written in node, a ton dependencies and work would be required for a normal user to use it.
I agree that the language should not be a feature, but it is. Containers/snap/flatpak sorta help with this, but they are even more work for the user currently.
A Java based tool requires installation of a JVM and likely has a non-trivial startup time. A Python / Ruby tool requires a runtime and probably some kind of mucking with virtualenv or rvm to work properly. A Node.js tool would require (haha!) a Node runtime and crossing your fingers that the NPM dependencies for what you're going to use to connect to your database haven't been compromised since the last build.
A Go based tool would be statically compiled, start up quick, and not have any external dependencies.
There will hopefully be a ripgrep-related blog post in the near future that will feature Rust quite a bit, but that will be about a library, not a tool.
I do encourage people in the Rust community to have the confidence to just be in Rust and let people find it out, like you did. There's good reason in the early days to wear the language on your sleeve, but there's also good reason as time wears on to project quiet confidence. Rust is, in my opinion, quite solidly there, at least relative to HN.
For me "in go" is useful information since I infer "easy to deploy" from it
If you look on the GH read me the Golang attributions are not quite as prominent.
Nobody would write "Universal C++ CLI ...".