Its not just the lack of control, the bigger problem is features that have been added in. There major use cases for C that go by its nature can not fill. It can not do bare metal programming or real time applications without major changes to the language standard. Go aims to be a superior system programming language than C but not a successor to C. No one will be doing audio codecs or device drivers in go, but I would consider it over C for a greenfield system daemon.