modern muscle
One of the things I like about new muscle is the dual nature or variability of them. Most have a Sport mode now that at least changes the throttle and generally makes them louder. And the ability to have an auto that can shift smooth and nice so the significant other enjoys the ride or snaps the shifts hard. ABS that can give you a line lock. Adaptable suspension that can go from standard to drag, or stiff for cornering. Even the ability to change the tune based on how much corn is in the fuel. Lots of things that can be changed at the pick of a button.
And things like variable cam timing and dual runner intakes that make the motor act like something grandma can drive or wants to rip your face off, depending on tune and/or RPM and throttle position. And returns mileage a 500 HP old school motor can only dream of.
All the fun you want when you want it, but smooth, quiet and comfortable when applicable. Hard to do that in an old car.