My old 1265 is well over 30 years old, no meter, no nothing, just a few knobs, but I know it so well, that 8 out of 10 times I know what is under the coil, and through many many years of trial and error, by raising and lowering the coil I can tell you the depth its at fairly accurately.
To your point, I only dig the clicks and pops, because then I know whatever it is has been down there quite some time, in my experience anyway, which dates back to the late 70's..man I miss those days, I could walk into any park and start pulling mercs and others at 2-3 inches heh...now bleh lol.
Mike