There would be single CPU die to make allowing for increased yields as opposed to an unique CPU per ram spec. As well a single motherboard sku that only requires a DIMM to be added to change system configurations. Future larger configurations would be offered on the same cpu process for longer. I’m honestly floored that they are going through the extra expense and supply chain challenges to avoid using a socketed RAM. There are plenty of reasons why this could work for them.
I got it the first time.
Any mismatch between CPU configuration and memory from a sales stand point is unrecoverable. It creates garbage for the pursuit of profit while making the consumer experience worse.