With talk of upcoming 8-speeds going in to future Challengers, I'm wondering why a muscle car would need 8 gears? Is it strictly for fuel economy, because extra shifting will slow 0-60 and 1/4 miles times. Then there's more complexity and cost. I remember when autos were 3 speed for decades!
Its possible that someday soon all automatics will be variable speed with no shifting, and manuals are gone for good.