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This was mostly a hat tip to a scarred past. This is a post about Go's GC tuning philosophy: https://blog.golang.org/go15gc

Can't speak for V8/Go/CPython but the JVM has a lot of knobs to turn (quick look at enterprise instances I've been responsible for: max/initial heap size, max/initial permgen size, max/initial newgen size, enable/disable dump on OOM, enable/disable GC logging, enable/disable compaction), some of which also depend on implementation (e.g. the IBM JVM used to have a different default GC policy which favoured fewer but longer collections and some of the parameters behaved subtly different from Sun's).

or .net runtime tuning.