True, my point was mainly that we don’t know the entire chipset line that supports QC 4+ just yet. An example is the below chipset taken straight off of Qualcomms website indicating QC 4+ support. Incidentally this chipset is on the new samsung galaxy s9+. The LG V30 for instance uses the same chipset as the Razor (Snapdragon 835 MSM8998), so it might be possible to support QC 4 as well. We really don’t know how far ahead these manufacturers looked when designing phones. A good example of this is the release of the LG G4 when it was stated there was no QC support. More than likely it will be a going forward only thing, but some tech companies may have designed their phones with this feature in mind already.
https://www.qualcomm.com/products/snapdragon-845-mobile-platform
https://www.androidcentral.com/lg-g4-supports-qualcomm-quick-charge-20-after-all