I have a Samsung 860 EVO SATA M.2 drive and it's fast, but will be faster on a motherboard with a slot for it. The Spectre flaw goes all the way back to the I think the first gen i7, and Intel was supposed to have released a micro code update for cpu's that have the flaw starting with I7 4770, and guess what ASUS was smart never to take that code and put out a new bios update for my board. Even with the Spectre patch to the OS, I still don't have any performance problems.
I'm starting to look at giving AMD a try once again. Tried AMD back in the 90's, but that wasn't such a great system.