They don't make literally every single request from a different address off a fully shared prefix (as if you just randomize the final bits but also maintain som

They don't make literally every single request from a different address off a fully shared prefix (as if you just randomize the final bits but also maintain some unique prefix bits, you still lost), so it is still worse than IPv4 with NAT, much worse than CGNAT, and AFAIK in most cases isn't much (if at all) better than assigning everyone a unique sticky address.