Re: for once...
> Personally, I'm not convinced that a company with only ~15% of the market is in a position to dictate standards
Market share isn't the only factor. 3rd party developer involvement also helps, and whilst developers are drawn to a big market share, they also appreciate commitment. And money. I haven't seen recent reports, but in the past we've seen articles about how more money is spent on iOS apps than on Android apps (people with pricey phones spend more money on software - shocker).
Of course, sometimes Apple doesn't dictate anything, but merely sees which ways the wind is blowing (see floppy discs, and later, optical discs).
Sometimes Apple gets it wrong - the Mac Pro was a bet on multiple GPUs, but then GPU devs favoured single, more powerful GPUs which broke the Mac Pros thermal design.
Your example - mass adoption of Lightning - was never going to happen because it is proprietary to Apple. However, many aspects of it were adopted in USB Type C.