Most importantly: having real physical controls (buttons, knobs, etc) makes a huge difference. Tapping fingers on a hard glass surface just isn't the same. Als

Most importantly: having real physical controls (buttons, knobs, etc) makes a huge difference. Tapping fingers on a hard glass surface just isn't the same. Also, the joy of a single-purpose device which makes it easier to get deeply into it. Also means no notifications or other distractions.