This is why people pay the Apple tax (although Google does just as well). Why are the other manufacturers so incompetent?
(This was last year's tests though, this year's look better across all manufacturers).
That doesn't mean it's OK, but that's my guess as to why you see the lag in quality.
Have you ever tried to charge an Apple phone or tablet with a charger for a non Apple phone?
No, but it is that their engineers seem to just consistently get things right. I doubt they cared about third party chargers at all. I would imagine they maybe even never tested with third party chargers.
But they engineered the system so well that they just worked anyway.
What track record? USB-C is their first officially supported open charging standard.