I don’t even know that I would call it inexperience. I just think a major part of the first pass was selling the idea of USB. You can design a perfect cable, plug, and protocol, it doesn’t mean anyone will use it. Most investors don’t know much about the technical details of a product. They do, however, understand the price. If you’re trying to make a difference in the world, you don’t always get to do it with style and quality.

AFAIK the real predecessor to USB was Serial cables and those were an absolute shit show. USB set out to create a more usable interface with a lower profile and cheaper cost. In many ways the minor flaws in USB becoming common gripes is USB becoming a victim of its own success. I don’t think they originally set out to become a power charging standard so the frequency at which devices were plugged in increased over time .