It sounds like a new train line, but no: Compute Express Link is PCIe 5.0 server CPU-accelerator glue from Intel and pals

Oh, compute, not commute. Got it. Version 1.0 of spec ratified, available shortly

Big-name tech companies will together unveil yet another interconnect, this one dubbed Compute Express Link or CXL, which is aimed at plugging data-center CPUs into accelerator chips."