What's the usecase of 512 GB memory that you cannot achieve through multi GPUs? Maybe you can make it bit cheaper as you don't require multiple chip, but I would say it is just a maybe because the chip is not the costliest part for Nvidia to manufacture, it is the memory[1].

[1]: https://www.nextplatform.com/2024/02/27/he-who-can-pay-top-d...