I don't understand why they axed the silent mode. I just did some testing with WhatsApp and with Priority mode on + sound, my phone still vibrates and audibly notifies. With priority mode on and vibrate only, my messages come through but there is no vibration nor any sound (i.e. silent mode). So instead of just holding down the volume down button to get to a silent mode, I have to hold it down + get it into Priority to get it into silent mode? This seems a little counter-intuitive to me as priority mode is supposed to only let certain notifications come through, and I have everything turned off.
Though from the above, it sounds like it might be a glitch? I had assumed priority mode meant that no notifications will get through (messages will still arrive in silent mode, but no vibrate or sound, no matter what mode is selected)?
I always simply switch my phone to silent mode before bed so nothing comes through except for my alarm until....well, my alarm. Now I guess I'll have to put it in priority and turn the volume all the way down...?