I see complaints about Go's GC being based on 40 year old technology, but nobody ever complains about nearly 60 year old sorting technology in standard libraries.
Possibly because we learn early on that "sorting is provably O(n log n)," and we can write an "optimal" sort ourselves. In other words, it feels like a solved problem. GC is a hairier beast, and it feels like there is still much room for improvement.
