Author here: If the article above has you excited, come and join my team at Apple. We're hiring Go and PostgreSQL developers in Shanghai, China right now. Relocation is possible, just send me an e-mail to find out more about this role.
Good question. I'm working remotely myself and can't relocate easily because my wife is a doctor and it's very difficult for her to move between medical systems. I was lucky to join this team when this wasn't considered a problem.
That being said, I'm in Shanghai frequently to sync with my colleagues and it's an amazing city. I've found pretty much most conveniences available to me in Berlin and to some extend even better. There is an active expat community, and a fascinating vibe.
My manager (from SF, USA) has been there for over a year now and has enjoyed the experience a lot and extended his stay. YMMV, but I'm fairly well traveled and would say that it's a pretty great spot if you're willing to emerge in a foreign language and culture.
My e-mail is in my profile.