But what I can't stress enough is how severe it can be. I went and lived in various places around the world for a decade, from about 23 to 33. The place I settled down most was in Ecuador, where I learnt the language, met my long term partner, and made some close friends and integrated with the culture. But I spent years in Europe, the USA, and Asia too.
All of the above was achieved just by coding software and selling it off some wordpress websites I put together.
And now I've been back in New Zealand for exactly 3 years, and it's awful. Life is so repetitious and small and boring. I've never been more miserable. And it's for the same reasons in this article, and that other people are mentioning in this thread.
The funny thing is that before I left I had no particular desire to go (I just did it because it was easy and my friend wanted to), and I was happy. But now, because I have had those life changing experiences, I'm not.