Always choose the right tool for the job? Nah. I know Go quite well, and I use it wherever I can. Want to find out why?

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Markus, a solo developer, advocates for using a single programming language, specifically Go, for all development tasks. He believes that this approach simplifies his tech stack, enhances productivity, and allows him to delve deeper into the language's features. Markus emphasizes that while most popular programming languages can accomplish various tasks, choosing one aligns better with his lifestyle and work preferences.

Go is my hammer, and everything is a nail

So, what, I’m going to limit my career options?

I think he should “go” learn more techs

C++ is my hammer and everything is a finger.

Go is great!
I’d suggest that you never stop looking what’s roughly going on outside your preferred eco system, though.
That said: You really can use Go for almost everything and it’s so easy to learn.

interesting, I personally like my frontends with React when I need it, but for the rest, I agree that in Go, anything can be build.