you seem extremely angry and toxic.well someone here pays attention..
lets stop pretending and ignoring threads just because your iphones "works flawlesly" then why are you here??
there was been several posts regarding this issue. camera app lag. Have never used ios 9 but from the searched ive done it all started then.
there is an extremely annoying lag when you open up the camera app. You have to wait from 10 to 20 or more secs to be able to take a picture... and for those who think "wait take a picture and move on with life" really? then whenever I want to take a pictures of my kids doing something spontaneous I should run home and get me camera out and attach lenses and what not... because the moment will wait there for me???
there is another addition issue with the iphone 7 plus app also.
it used to be plain and simple.. none of that bs live photos and what not. click slide and take picture.. sharp and fast. Now its just like im using an android device.
Downgrade to iOS6 and all solved. next