Wireless is not even close to audiophile quality. My everyday $200 Sennheiser Momentums will simply destroy any wireless headphone on the market, and this is the low-end.
Nothing in portable audio will come close to audiophile quality. Get that out of your head. The closest thing to acceptable quality for audio enthusiasts are external DAC/Amps, the smallest good ones are larger than an iPhone. Whatever you think of your Sennheisers, to audiophile ears they sound like crap. People who are serious about audio spend more than that on speaker terminals. And no, I'm not referring to voodoo-philes who fancy products beyond the realm of physics.
Interesting to note, also, that none of the decent (for lack of a better word, being a speaker man myself) headphones I've ever owned had a 3.5mm plug. They all have 1/4" plugs. The 3.5mm plug and associated flimsy cables are not compatible with audiophile quality.
Portable audio is about convenience, not quality. There are certainly large audible differences even at this bottom of the barrel, but do not kid yourself that you're getting any sort of high quality out of a smartphone jack. Your best chances lie in fact with future wireless cans that have quality DACs and amps built in, and use an improved wireless comms stack.
Again, the jack removal had nothing to do with courage, or progress, and everything to do with increased income potential for Apple at the expense of customer.
Despite ample evidence to the contrary you keep clinging to this delusion. Wireless audio isn't going to improve unless someone takes a bold first step. The past decade or so is proof of that. Most companies able to take that bold step are lacking the courage. They prefer that someone else blazes the trail and then follow with me-too products. Just watch.
As for increased income, you realise that Apple is throwing in two DAC/amps in exchange for a commodity socket? Do you think they're making a profit out of that? Do you think they're lusting for your $9 to replace the lost dongle?
Removing the headphone jack is part of a very long (and somewhat risky) game for them, not some quick money grabbing move.