Can You Help me Understand This SATA NVMe PCIe SSD Gen

So the second slot should still function for me, am I right? Also, will all manufacturers clearly state this if this is the case? I was looking at a similar

Description: The second generation of mini SATA and an increasingly common SSD form factor, SATA SSDs come in a variety of sizes expressed

what is a slot game So if you use more than four SATA drives, M2_3 is out But: I would prefer M2_3 when you have a graphics card with a certain power draw Because

what is a slot pull on a cruise when you say it never works out like that, what do you mean? that i'll want to put more stuff on the ssd? i'm only looking for a boot drive bc