As much as I like the muscle cars back in the day, the new high performance iron is far superior to them. And yes, I owned a few back in the day. I had a '69 Charger R/T, 4 speed, Dana 60 posi, headers, and needed 98 octane to keep in from pinging under hard acceleration. It was fast, comfortable, and handled pretty well for its day. I also owned a "74 Duster 360 4-speed that had W2 racing heads, upgraded rear end, headers, slightly lowered front end, 60 series rear tires, 70 series front tires (they were radial Dunlop GTs). It was also fast. The Charger got 9 MPG if I kept my foot out of it, which I didn't, so I got 5-6 MPG. And although I drove it at 135 mph at times, I wouldn't recommend doing so unless you're on a closed course. The Duster got 13 MPG and covered the 1/4 mile in a little less than 13 seconds.
My younger brother had a '70 Chevelle SS with the big daddy 454 hi-po and I had a friend who had a '70 Challenger with a 426 Hemi. These were wickedly fast, but like my Charger, got like 8-9 MPG when you drove them easy, and 4-5 MPG when driven the way they were built to be driven.
All these cars took about 260' to stop from 70 MPH on dry roads, at some rain, and the stopping distance went up because antilock brakes didn't exist.
And all of these cars required tune-ups every 12-15,000 miles.
Today, my daily driver is an '05 Dodge Magnum RT 5.7 Hemi. It has 350 HP, gets 25 MPG on the highway, gets 20.5 MPG overall, and out handles and out brakes the '69 Charger, the '74 Duster, the '70 Chevelle, and the '70 Challenger Hemi. In fact, it does the 1/4 miles faster than those muscle cars by more than a second. A tune-up consists of spark plugs every 70,000 (I use E3 plugs).
And my fun car is my '91 Corvett ZR-1, a 400 hp supercar capable of 185 MPH. It gets 25 MPG on the highway, corners at over 1.0 g's, stops from 70 MPH in 150', and a tune-up consists of spark plugs. I've driven this car 140 MPH, but don't recommend anyone do so unless on a closed track because you never know when some idiot will do something dumb like pull out in front of you to pass a truck on a rural interstate with little traffic. And at 140 MPH, things come up pretty damn fast.
And the new C7 Corvette has 450 bhp and gets 29 MPG. And the C& Corvette ZO6 has 630 bph, gets 28 MPG, and tops out at close to 200 MPH. It can also stop from 70 in 130'.
The bottom line is todays vehicles are far better than fire-breathers of the muscle car era of the mid-60's to '72. I loved the muscle cars back in their time, but I will not trade the new, high performance cars for them. The new ones are far better, faster, handle very well, and stop a whole lot better than the muscle cars of old.
Ii remember back in the day (I graduated high school in 1971) the middle-aged folks waxing poetic about Hupmobiles, flat head Ford hot rods, etc. Just like folks are doing now with muscle cars of the 60's and 70's.