But those pointers still have bits in them that indicate the type of the object that they point to. It is merely the case that the tag bits are chosen at run time so that they correspond to allocated memory regions, rather than being chosen ahead of time.
None of the bits in the pointer have been "stolen" though, which is the point of the referenced article, they are all still available to access the full address space of the CPU.
That doesn't mean that they aren’t still there, and don't tell you the type. It’s still a tagged pointer, and because all objects of the same type must be allocated out of the same page (or collection of pages), it still limits how much memory can be dedicated to objects of that type.
