When did slots become commonplace? And NVME slots?

We explain PCIe Gen 4, how to get it and if you should upgrade Trisha looking at an NVMe SSD in a PC case 4:07 NVMe Storage Explained We explain NVMe and

You could also do the second slot for PCIe x4 I have a Gigabyte GA-P55-UD4 and no idea about all this new stuff like NVMe SSDs, PCI

what slot machines have the best payouts does up to 3,500 MBs read and 3,300 MBsec write To me it looks like to get those speeds it must be plugged in an X16 slot? I can't do

what is a triple slot gpu slot it has, It looks like it is an NVMe slot but most of the SSDs I have seen online have 5 pins and this slot seems to have 4, please