Which language released in the last 10 years is more popular then ? Golang is arguably niche and does not offer the huge flexibility and ecosystem of say Python, so i am pretty sure it will never come close to that, but there are a good number of usescases where it arguably is the best choice.
Scala, with 164 jobs in London and 225 nationwide, has been around for about the same time as a production-quality release. I raised the point because I think Golang's coverage on HN is disproportionate to its significance in the job market.
London is about 'fintech', so Scala is in great demand.
SF Bay Area is about 'webscale' so Go is popular, as it established as The Cloud Automation language. And HN crowd is mostly leaning to SF. OTOH you wouldn't find a great demand for Oracle DBA or C# skills in The Valley, and that's not because they are not in great demand somewhere else - maybe even basically everywhere else like C#.
Places lean to some niche or other, and vice versa. Apple places its growing hardware teams in Texas despite new campus in The Valley and all that. Why? Because Austin is very much hardware place.