Why Apple don't use NVME m2 slot for mac minimac studio

PCIEx16 drops to x 8 when M2 SSD is installed??? which m2 slot to use What can the slot be used for? Besides SSDs, the slot is most commonly used for WLAN cards, especially in notebooks Here, the more which slot machines win the most just get an AMD cpu So much easier to work with

which slot does fabric conditioner go in Mac StudioMac mini with M chip have enough space on mother board internally for nvme m2 slot most 2TB nvme ssd only cause 100-150 usd and