Go (Golang)

We took a lot from it.

Why Go

Because most outages are caused by a configuration error and a configuration language is the most important tool in the hands of a platform engineer.
Configuration as code as in programming language code, not JSON, YAML or HCL.
Go is a strongly typed language. IDEs provide a great developer experience with autocompletion and type safety.
Tests are a first class citizen: it makes trivial to write a test to ensure correctness of the configuration
Most of the infrastructure tools are written in Go: i.e. Kubernetes, Prometheus, Istio, Tekton, ... it is easy to interact with them and leverage their APIs/structs.
Dependency management: Go modules provide a simple way to manage dependencies and reuse code with the correct version to ensure compatibility
Documentation: Go recommends godoc formatting as it can leverage native comments for each struct's fields in order to provide comments/examples in the IDE of the developer, which increase productive and correctness.
Quick feedback loop: Catch most mistakes and incompatibilities in Go compile time. Go has very fast compilation time, which feels like you are running a script.
Limit the number of languages used in the organization to a minimum : Go is one of the cleanest, simplest and developer friendly languages that exists.
Backwards compatibility: Go is well-known for its backwards compatibility making it a great choice for long-lasting platforms reducing rework through breaking changes.