One great advantage of garbage collection is that it removes need for thread synchronization in cases where is it only needed to make sure that object jou are g

One great advantage of garbage collection is that it removes need for thread synchronization in cases where is it only needed to make sure that object jou are going to call free/decref on is not in use in another thread. Corollaly to that GC is the thing that you need for many lock-free data structures to be practical and not of only theoretical interest. It might seem that it is simply about pushing your synchronizations problems onto the GC, but the synchronization issue that GC solves internally is different and usually more coarse-grained, so in the end you have significantly smaller synchronization overhead.