Regardless of whether the newer detectors are deeper, lighter, faster, wireless and submersible, the 1970's and 80's was definitely the best era for detecting. Most who didn't begin detecting until the mid to late 1980's can't imagine the amount of coins and/or relics that could be found. My first detector was a kit BFO in 1969. It had a 6.5 inch coil and struggled to get a quarter three inches deep, but finding well over a hundred coins in a hunt with it, including many silver coins, at places people had frequented for a long time was common. As you've said in the past, each advance in detectors opened up another layer of coins, relics, etc, an inch or so deeper and it was like hunting virgin sites all over again. I've been retired for five years, spend at least five times as much time detecting as I did in the 70's and 80's, have detectors that will go about as deep as any other VLF's out there and others that have excellent target separation and work well in trash, but the number of coins and other desirable objects I and the guys I hunt with find in a hunt now is a pittance compared to what those of us who detected in the 1970's and 80's found back then.