Hadn’t heard of a dead pedal before. What I found out was that it is primarily used in standard transmission equipped vehicles to keep left foot on same plane as clutch pedal to cut response time to clutching and to prevent riding the clutch. Also as a foot rest and as a brace in a collision. It’s all personal preference I guess. Even with the seat all the way back, still have to keep knee bent. It’s too restricting for me. On long drives on cruise I like to be able to stretch out. I’ll get used to it or get out the sawzall!