I was mostly having typical application programming languages in mind such as C# and Java. Go doesn't exactly fit that bill and I've seen it be used more for technical plumbing that needs a good concurrency model. And Maven isn't exactly new.

Frankly, PHP also has a very good packet manager with Composer. In general, PHP has done surprisingly good and sane decisions for the language and extremely solid support for static typing by now.

But yeah, Cargo definitely had the benefit of Hindsight.