Even old school, the etrac has so many options that some of the newer detectors do not have..... for example adjustable ferrous settings and conductive settings allows you to zero in on any target with amazing accuracy.Minelab has the market on the fbs/bbs tech....others are trying to match or exceed it with multi frequency....
Also a lighter machine is easier to use and control which helps the user....better ?????.......a lot of people are trying to prove it as we speak.
A breakthrough detector that outperforms all the rest will, of course, be noticed....should it be manufactured and used....time will tell.
Until then, swing the fbs/bbs machine.
Once mastered, it can almost guarantee a successful recovery of any specific target without a lot of trash being dug in the process.