Why have chargers moved to using USB power cables?

Noticed when looking at chargers lately, many use USB cable/power block.

Why the move? What advantages are there? And are there any disadvantages?

The old AC brick and DC input seems less messy, and don’t have to bother to buy a separate power block (for those chargers that don’t supply it) that will be capable of running the charger at all of its rated outputs.

(Tried using a search engine for answers but apparently don’t have the wordage right to come up with the relevant info.) Thanks!

Original source: https://vapingunderground.com/threads/why-have-chargers-moved-to-using-usb-power-cables.667707/

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