If I am going to have to support an application written in it to clients, then damn straight the language needs to prove that it will be worth the investment.

If I am going to have to support an application written in it to clients, then damn straight the language needs to prove that it will be worth the investment. Many of the features you mentioned are not available for the .net core version. The .net core version is not a standard install on client servers (it is not shipping with RHEL/CENTOS) and is still very recent. Having supported dozens of Java apps through the early versions, the last thing I want to do is spend my time discovering esoteric runtime / os library version conflicts. So yes, the language needs to prove itself that as a platform for delivering Linux / Mac server apps that it is as boring and reliable as the rest of the stack.