The syntax is elegant, concurrencies consume an order of magnitude less in the memory stack and it has such a good performance benchmarking.
What excites me the most though is the TensorFlow wrapper for Go that Google has recently stated it's developing. It's a huge advance towards high-scale, real-time deep learning.
BTW, in a few days I'm giving an introductory workshop to backend development using Go, I'll talk about some of the examples mentioned for sure.
However, I know that Dropbox is one of the biggest Go users and it isn't in this success stories list. Anyone knows more about it?