Rack level disaggregated compute-memory-storage-accelerator architectures allow for dynamic partitioning/aggregation of hardware to suite concurrent workloads and their evolution over time and make it easier to achieve both cost efficiency as well as incremental, continuous and non-disruptive hardware upgrades.
Wendell Level1techs has been talking about his Liqid PCIe Fabric stuff lately, sounds pretty sick, this mention inspired me to go search for his other videos on the topic