All good wired headphones and earbuds (“IEMs”) have replaceable cables. And the ones that don’t are super cheap.

I tested this and based on my testing it’s (3). The AirPods microphone actually gets (slightly) better in quality if you don’t play something through the speakers while using it. Even then the 3.5mm ones were better tho

Windows Phone couldn't run the majority of desktop Windows apps (those developed with the "Win32" API). They developed an entirely separate API for Windows Phone apps and it was similarly locked down as iOS/Android.

Probably a one off? Instagram’s e2ee was opt-in from the start- and meanwhile Facebook Messenger is now “e2ee for everyone” and none of this is affecting the main e2ee messaging apps people use - WhatsApp, Signal, and iMessage