Go is very simple, provides decent static type safety, has a nice concurrency model, and compiles to fast static binaries across all major platforms. People choose it all the time because it’s a great choice. A wild number of popular open source tools are written in go, very few of them created by google. As someone who wrote go for many years I think you’re overstating how limiting it’s “major flaws” are. And fwiw go ranks much higher than haskell on stack overflow’s annual developer survey.