puahhaa, well, you know what I mean
I own a Samsung S7 and they are pretty slow on pushing the new Qualcomm Quick Charge to their phones (understandably, since Note 7 blew up).
All I know is that the S8 and S8+ both still have Q.C. 2.0 and is PD capable and seeing that I am most likely staying the route of owning Samsung phones in the future, I think getting a Q.C. 4 power bank would be a nice addition for me and won't get outdated in a year or two. Good thing Q.C. is backward capable with previous versions.