Go is a great language. Building REST servers in Go is a doddle and the related tools have obviously been designed to work well together from the outset which is unusual.

That said, I started learning D at about the same time as Go, and for some reason D has attracted me more. Possibly the C ABI compliance (I was doing some JNI work at the time).

One question that I haven't found the answer to yet though is how well Go apps perform for long running processes, eg weeks or months? Have there been any issues around memory usage or resource handling? Any need for restarts?