There can be advantages (and ZOMG so much confusion) in allowing multiple knobs though. Java takes it to an extreme and we're somewhat in the territory of nee

There can be advantages (and ZOMG so much confusion) in allowing multiple knobs though. Java takes it to an extreme and we're somewhat in the territory of needing a black box opitimiser, but you can adjust the GC to suit a really wide variety of workloads and requirements. By leaving it to one knob, Google/Go is heavily limiting the uses of the language.