Playing while lying down takes it to another level. No need to spend hours sitting in an uncomfortable chair—lying down, I can relax, focus on the game, and still enjoy the comfort of my bed or couch.
With my phone or laptop propped up, I can play without rushing, carefully analyzing each hand. If the game lasts long, no problem: I adjust my pillow, change positions, and keep playing. Plus, playing this way helps prevent the back fatigue that sometimes comes from sitting for too long.