RPi5 exposes 1 lane on the PCIe connector. It routes 4 lanes to the 2040 chip that provides much of the board's I/O. IMO 1 lane is better than none. I love the

RPi5 exposes 1 lane on the PCIe connector. It routes 4 lanes to the 2040 chip that provides much of the board's I/O. IMO 1 lane is better than none. I love the CM4 because it exposes 1 PCIe lane and that can support a NVME SSD making it the first Pi that supports what I consider to be a decent storage interface.