I often say that you do not want to board first. You want to board ‘not last’ so that the plane hasn’t run out of overhead bin space by the time you get on. Boarding early is about one thing only: not having to gate check your carry on bag.
That’s why I absolutely love a quick overnight, and on a two night trip sometimes stretch myself to travel with just my laptop bag, so that I don’t need overhead bin space. I can show up at the airpprt later. I can work productively in the lounge. And I don’t have to rush boarding. As someone that values every 5 minutes in my day (I really do keep myself that busy), this matters to me.