Nah, the chipset doesn't have much to do with that anymore. AMD's current desktop CPUs provide 16 PCIe lanes for the GPU and 8 lanes for a pair of NVMe drives; the PCIe lanes provided by the chipset are in addition to those (routed through another 4 lanes from the CPU). Intel's current desktop platform provides 16+4 direct from the CPU, and routes 8 lanes to the chipset.

The high-end chipsets are for people who think they still need lots of SATA ports, or lots of high-speed USB ports. Or for people who want features that are artificially restricted to only be available on boards using the high-end chipsets.