Would this help? My understanding is that the copy was so that the new object exists in the heap of the receiving process, and therefore the GC can have a stron

Would this help? My understanding is that the copy was so that the new object exists in the heap of the receiving process, and therefore the GC can have a strong guarantee that all objects within a process belong to the GC for that process. Whether moving an object between two GC’d heaps is even possible (let alone simple or complicated) surely depends a lot on the GC implementation. The implementation of concurrent GCs is not easy...