golang does have BLAS bindings through gonum:
https://godoc.org/github.com/gonum/blas/cgo
Coming back to the main question. I use Go as my primary language these days. E.g., my dependency parser and neural net dependency parser (which uses the aforementioned BLAS binding) are written in Go:
https://github.com/danieldk/dpar https://github.com/danieldk/dparnn
What I like about Go: it's C-like without the unsafety of C nor the complexity of C++. Moreover, I've found that working in Go is generally as productive as Python (short compile times, good tooling, completion in vim, lightweight package system), while being much faster and better-fit for large projects.
What I dislike about Go: it's a cliché, but the lack of parametric polymorphism is jarring.