PCIe NVMe SSD on PCIe slot-Worth it?

Gen 4 is faster than Gen 3

2 Slot is from the Ryzen 7 5700G then it will only support PCIe Found this tech site that explains that a Motherboard can have both PCIe and slots:

can i use gen 4 ssd on gen 3 slot You can plug pcie into slots as it's backwards compatible but the speeds will be limited to Gen 3 It wouldn't be able to go above the

can indian casinos control slot machines You can plug pcie into slots as it's backwards compatible but the speeds will be limited to Gen 3 It wouldn't be able to go above the