Go? Archaic? I suppose you are referring to the paradigm it employs...
It’s archaic enough that everyone can get things done instead of worrying about esoteric new features.
Source: A couple of talks at FOSDEM.
Don't attribute to technology the outcome of political decisions.
I also used to get things done in TASM.
Maybe the people behind Istio, InfluxDB, Docker, Traefik, Terraform, etc also chose the “archaic” Go for “political reasons”.
You're implying that if a tool is archaic, things cannot be done with it (also not true).
You're also explicitly saying that the features James mentioned are esoteric, which is easily disproven by the fact that many mainstream languages have them nowadays.
Go is what I'd call minimalist. COBOL or fortran are what I'd call archaic.