[juergbi]

No, the 56C/112T Intel Xeon Platinum 9282 is a BGA part, it's not socketed. You can buy this niche product only as part of a server with liquid cooling.

And the successors to Cascade Lake seem to switch to the LGA4189 socket to support 8 memory channels (Cooper Lake and Ice Lake), so I wouldn't expect any upgrades on LGA3647.

[rbanffy]

You are right about the socket - ark.intel.com doesn't mention the socket for the two top-end parts. All others use the previous one.

The good news is that the next generation Mac Pro will have a ton of extra memory bandwidth.

[jlawer]

The bad news is that the next generation Mac Pro will be released in 5+ years from now