To add to this, a problem with becoming an expert on anything is that you can start to love your understanding of the complexity of the thing and lose the objectivity necessary to evaluate the thing.

This can lead to endorsing advanced features instead of simple easily composable ones. The advanced features will be poorly adopted in the field due to not everyone being an expert.

This is probably the best single thing about golang. The language has many flaws, but this is not one of them.