As a Platinum member, I seldom board during the elite boarding process. Unless I have a bunch of carry ons and the plane is full, I just wait until the end to board. Other than ensuring that you get overhead space for your carry ons, having to sit in an uncomfortable seat(provided I wasn't upgraded) for an additional 20 minutes while people's bags slam into your leg is hardly a perk. I would much rather stand for that additional time and be one of the last people to board.