As funny as it may seem, stupid (or greedy) laptop manufacturers still leave at least 16 pci-e 5.0 lanes hanging in the air in Zen4 (where there are 28 lanes!). If they ignore free pci-e 5.0 lanes in laptops, further increases in bandwidth pci-e bus are pointless for laptops. And it is especially pointless if the RAM bandwidth of laptops is not increased at least 5 times immediately to real (in real tests) 250-300GB/s for typical laptop. And at 10 times for top-end laptops with HBM3e 512-1024 bit data bus..
This is a site about laptops, right?