I think your point is a little incoherent, since C# is an ISO standard, while Python, Perl and Ruby aren't, nor do they have "lots of free compilers available".

Personally, I don't use Gmail, Android, Chrome or ChromeOS, for real reasons pertaining to data ownership, privacy and maintenance of services, but I see no reason not to use their fully BSD licensed tools that I can run on my own hardware. If Golang 2.0 suddenly prevents you from making HTTP requests to any server outside the Google networks I'll be pretty pissed, but I find that pretty unlikely.