Go and Julia are fun languages.

In production, Go has proven solid for several years. It is best when used with the native code people ported.

There are only two issues I encountered:

1. getting the legacy ancient C source meta-circular Go compiler working to port the Go boot-strap compiler upgrade chain is a kick in the pants. However, once it is on a architecture it has proven rather resilient.

2. memory limited systems can develop reliability issues, as Go programs will often ungracefully throw hard to diagnose unrelated errors during each crash. A good metric is 3:1 of your average load as a safety margin (if you see 2GiB in average RAM use, make sure to over-provision the host with 8GiB RAM etc.)

Other than the above short list of edge cases, if you join a pure Go project it is usually pretty reliable. Most community folks interested in the language seem fairly competent at building stuff that is fun. =3