Since 2007 the de facto standard for other devices has only changed once too (micro to USB-C). Mini USB has been obsolete since 2007 and USB-A is the other end of the connector and not really comparable (Apple has actually since changed on their devices from type A to type C in that time).

For me Lightning is just another in your list of connectors that I wish would go away and standardise to USB-C.

As someone who is travelling right now, with a two port charger and two iPhones, an iPad, a laptop, a Switch, an Apple Watch and two sets of USB-C headphones between us, one connector would actually be a significant quality of life improvement (though an even better one would be hotels not killing power to the socket when I’m not in the room so I can charge my devices while I’m out!)

I imagine that the caterwauling around the change from 32-pin to Lightning somewhat plays into their decision not to move to USB-C. Obviously the overtly cynical will put it down to purely profiteering...