I do have lyrics on laptop but seldom use them. On the occasions when I do need them, I don't want the audience to see me looking at the laptop anyway. My PA4X has a nice large display where I can pull up any needed text either manually or by Songbook. Scrolling is assigned to both a button and a foot switch, whichever happens to be most convenient at the time.
I have at least 4,000 text files and a large part of my income is derived from doing requests. Text display is essential for me, but I understand not everyone cares about this, so use whatever is best suited for YOU.