Your arguments seem rooted in the past. This isn't about the future of wired audio. It's about the future of wireless everything. Anyone who wants to use their expensive old headphones can slap a cheap adapter on them, leave it there, and be done with it. Within a few years 80% of all music will be enjoyed wirelessly, so all this hubbub over the precious 3.5mm is a lot of pointless fist pounding and hysteria. Even now, my wired audio usage is around 5%, and its pretty much only when I forget my Jaybird X2s. (Also, I wouldn't rule out an entirely new standard for wireless audio sometime down the road that reduces/eliminates latency completely. Wireless innovation will go through the roof once the market grows the way it's about to.)
Your argument over market share is so misguided it's hard to know where to start. But suffice it to say, hundreds of companies interested in profit will be making tens of millions of lightning headphones for Apple users to buy. And many others will be making them with an option for either Lightning or USB-C, because once you have the DAC part out of the way, the dongle at the end isn't a big deal. Apple, and Apple users, will not and should not give a rats ass about what Samsung does. Despite your protestations it will have zero impact on them.
Fortunately, your doom and gloom prophecies won't come true. Apple has succeeded wildly in delighting consumers and making historic profits for years while having a proprietary cable for charging & syncing, and they will continue to prosper in the same way with a proprietary audio connection. Which will itself become increasingly less relevant in a wireless world.
