You may be right, and I've had to live some of that myself with docking stations, thunderbolt, and such.

But those moments are the exceptions. In my everyday life, when I need to charge _anything_, except maybe for the laptop itself, I just look for a charger with USB-C and it works. It maybe faster or slower depending on everything you just wrote, but it works.

On a side-note, when I take the charger of my laptop, it can charge absolutely everything.

So yes, that's a true and honest improvement.