Go's GC has a single setting that can be tuned: https://golang.org/pkg/runtime/debug/#SetGCPercent

And yet, it performs great, including predictable STW latencies, all with a relatively simple and straightforward algorithm. With that in mind, the Java GC's manifold ways of tuning the GC in all its aspects for minimal performance improvements sound more like something that was purposely built as something people can build their livelihood upon by providing consulting services, rather than something that was built for the best performance possible for everyone.