> very large heap sizes It is not heap size that matters, but how often old objects are mutated. Basically, if you have 1TB of immutable objects, you are lucky

> very large heap sizes It is not heap size that matters, but how often old objects are mutated. Basically, if you have 1TB of immutable objects, you are lucky, but if you constantly modify all the heap, then you will have a lot of headache. GC authors continuously mislead on this issue for many years (they promised the same with multi gigabyte heaps but with G1 several years ago).