AMD definitely has a recent high end desktop/workstation platform with its ThreadRipper Pro WX CPUs (EPYC server CPUs) that have 128 PCIe 4.0 lanes and 8 memory channels. And enough PCIe slots to actually use this throughput with the right kind of hardware, like a bunnch of PCIe4.0 NVMe SSDs [1].

Yep, the platform is 2 years old, but supports both the Zen2 and current Zen3 CPUs (but not PCIe5.0 & DDR5 as Zen 4 requires a different CPU socket and is only announced right now, not available from AMD until the end this month).

However, 8 x DDR4 channels and 128 x PCIe4.0 lanes still give you better total bandwidth than 2 x DDR5 and 24 x PCIe5.0 like the few currently available DDR5/PCIe5 platforms support.

[1] https://tanelpoder.com/posts/11m-iops-with-10-ssds-on-amd-th...