Rather, the question here is why such a hype around microservices architecture.
For large projects this is true, easier to maintain, easier to scale, easier to test, deplot, etc.
Specifically Go good because fast, easy to learn, multi-threaded. YouTube is full of videos with mitapov major projects: Avito Badoo, VK, Gett taxi, etc. and there are very clear where they Go help. For example, here is a video from Badoo: https://www.youtube.com/watch?v=uO268voCGwA
Teamleads different other companies had seen it all, and also wanted to try. And began to receive job offers and from unknown companies.
Php also appeared asynchrony and multithreading (React PHP, Swoole etc.) and performance all is well
. But in the production of a large company, apparently, (yet) it do not want to take.