Maybe, but I’ll think you’ll find for many its to be able to find an overhead bin for their carry on close to their seat.
That was the theory of priority boarding. It wasn’t ‘first’ boarding. It would be wonderful to be able to saunter down from the lounge at the last minute and just swan aboard using a dedicated clear lane.
But the overhead bin thing means that, if you hold back, your legroom will be occupied with your stuff.