Re: Turning point?
@wolfetone
When apple ditched the 30 pin connector they just swapped one proprietary connector for another on accessories that are only used with an iPhone. Yes, Apple probably made a fat extra pile of cash out of people replacing their accessories but, assuming they only wanted to make money and it didn't offer a some kind of improvement, that's not a trick they can pull often. Ten years ago each mobile manufacturer had their own proprietary connector and were quite happy to change these every few years - I have a box at home with a multitude of hands free earphones as testament.
I would agree with djstardust regarding the headphone socket. This is a standard port and most consumer level things that kick out audio support it - you can plug almost any pair of headphones into any device with a 3.5mm jack. I've seen claims it's old tech and Apple led the way with ditching the Floppy Disk drive but FDDs died because their capacity didn't keep up with storage demands (BIOS supporting "Boot from CD" also helped) - the headphone jack may be old but it isn't obsolete. I may be in the minority, but having a Lightning to 3.5mm jack adaptor dangling out the bottom of a £600+ iPhone (so it can be 0.1mm thinner) doesn't strike me as either appealing nor the sign of a cutting edge innovative move. If improved water resistance (something I think already done elsewhere?) is the goal I don't believe for a second Apple's financial muscle is unable to source 3.5mm jack sockets with water resistance matching the adjacent lightning connector.
Apple seem determined to push and push and push. Right now they seem to be pushing too far but, as is typical when this happens, they won't realise until it's too late. I lost interest long ago in their disposable/non-repairable/non-upgradable "It's all soldered to the MB" Macs and considering the number of bugs I trip over in iOS 9 it won't take much more than a dropped 3.5mm jack socket to make me lose interest in a new iPhone.
[That said I agree with you on Beats headphones - nothing comes close to my HD-25s]