Eh. Apple's done this before, as Gruber points out, and they basically won. Nobody at this point (at least, that I hear) complains about Lightning cables. Ditching the 3.5mm jack might be a bad idea, but Apple does have a track record of doing this, which is probably why they think they can get away with it now.
Lightning was a proprietary Apple connector that replaced the older proprietary 30-pin Apple connector. Not at all comparable to removing the 3.5mm jack.
I'm all for keeping the jack output, but using a 2.5 one doesn't solve the problem.
You mean a lightning to 3.5 and an usb-c to 3.5 one. With mandatory Apple/USB tax, DRM may or may not be included, and questionable DAC quality.
A fully passive 2.5→3.5 adapter is much easier, would work with all vendors, and has no potential DRM backdoor capability.
And we'd probably quickly see headphones with native 2.5mm plug and an included 3.5mm adapter, just like we currently have for "high-end" (read: $100) headsets and 6.35mm.
I'd pay for more battery life, but the bonus was just not worth it. It was easily twice as expensive as the phone I brought, with similar specs. Batteries last for a couple of days already, some more days are just not that big a differential.
We already have a standardized 2.5mm jack to replace the 3.5mm one in space-constrained environments (just like 6.35mm is still around for hifi setups).
Why is everyone pretending we need to ditch analog audio completely for smaller phones when we can just start using 2.5mm (again!)?