Good design = it gets shit done. I don't care for PHP syntax, but it gets shit done. Any definition of good design beyond that simple metric is pure masturbation.
Docker is written in Go and $95m is more validation than you'll get in ten lifetimes.
So you think that the ability to execute a large project successfully implies nothing about the quality of the tools used to implement the project? I disagree.
At no point have I made a relative statement about Go being better than another language. The only claim I would ever make is that Go is well designed and effective for certain tasks, as demonstrated by use (validated by investment, which we can accept if we assume rational investors -- not going to debate that).
Now the claim that started this was that Go authors are greenfield celebrity programmers and they don't spend their time in the trenches (as indicated by certain parts of the language that some people - usually from "enterprise" languages - don't like; heavily and unapologetically paraphrased). That statement is asinine when you consider the background of the authors and the projects they've been involved in over their collectively lengthy careers.
Docker is written in Go and $95m is more validation than you'll get in ten lifetimes.