Not including the charger in the box is ridiculous full stop. Who had a compatible charger at home already? Nobody by the sounds of things. How is buying several chargers better than just putting one in the feckin box."Up to 45W(5.0V=3.0A, 9.0V=3.0A, 15.0V=3.0A, 20.0V=2.25A, 3.3V-11.0V=3.5A, 3.3V-16.0V=3.0A)"
^ Taken from the amazon page for the Spigen charger.
No support for 21V so no 30W fast charging. Even if it did support 21V, I doubt it would go over 18-20W, based on my findings.
Of course it's ridiculous because even with "only" 20V, the charger can push 2.25A which is more than enough for 30W charging. I don't understand the point of PPS if the voltage/current combinations are not dynamic. The implementation of PPS so far seems to make a mockery of the intended purpose of the standard.