But it is a real leak, it's just an artificially created leak. These might be interesting to investigate for DOS potential, but they don't happen under regular

But it is a real leak, it's just an artificially created leak. These might be interesting to investigate for DOS potential, but they don't happen under regular usage because you are searching a needle in a haystack. [edit after your update] Each GC strategy has its drawbacks, for example the one used by Go has the least overhead in extra memory usage, and it's also simple to understand and implement. Mono got its precise GC only last year, it survived 8 years with a conservative GC. Go is only two years old.