I dunno. When a Skype voice call on my iPhone ends, I look at the screen, and press the sole red button at the bottom-right of the screen.

It's a heart, and it attempts and fails to "like" the voice call.

Then I press in the middle of the screen and the sole red button becomes a "disconnect call" button.

How does that get through A/B testing? How does that get through, "hey Aunt Linda, try to make a call." testing?

You assign the A-team to work on other products while the B-teamers work on Skype and create their own unholy mess.