Thank God! Please Do Not Remove the Mute Button.
Exactly.
Capacitive buttons as a replacement for primary function buttons on a phone have ALWAYS failed:
HTC's S640/S620 came close and worked yet over the initial year had functional issues. Any boot sequence in Windows PocketPC smartphone edition for that device was moved to the keyboard.
BlackBerry's Passport : the primary keyboard buttons' functions stayed INTACT and worked as tactile buttons, the only function for capacitive touch was for pseudo app/text cursor movement or for single/triple/multiple character/word deletion. Both worked in harmony and always worked.
I've always felt this was far too ambitious and quick for Apple to do. This will take at least a full 2yrs to get it right. Volume and sleep/wake/power buttons go ahead, but the MUTE/Sound switch should remain as primary. period.
We've seen far too many very effective features of smartphones going away - many very efficient beyond current standards:
LED notifications:
BlackBerry was famous for this and via 3rd party app a user would/could customize.
Sony's Xperia is THE only phone on the market that still has this! Right now it's STILL more efficient than a 1hz OLED always on display function. 1 RGB/etc LED to let you know an SMS/VIP set SMS arrived, an Email, a missed call (add rapid intervals for how many calls: 1, 3 , or more - mods of course). Unlock the phone to see specifics in Notifications.
Mute/Un-mute switch .. Apple and OnePlus I believe are the only 2 remaining that have this.
Dedicated Camera / Video button: again ONLY Sony has this and from a Lock Screen and especially from a screen that is locked and OFF STILL the fastest. Soon will be gone. Short press = camera. Long/Deep press Video.
huh ... I'm beginning to really sound old now and I'm not yet 50!