I agree with Capt Kirk. If we always hunt the same location, and for the same targets, we might find settings we like and almost never change them. I hunt many different sites for relics, just jewelry and/or rings, coins, civil war sites, Indian camp sites and the locations of old trading post, so use just about all the settings.
If I have mostly ferrous, left side of screen black, rejected then prefer to hunt with conductive tones. If in IM-16 or most of the screen clear then like ferrous sounds. The settings are for a lot of different users all over the globe.
That however is not why we pay big bucks in my opinion but because the technology is, in my opinion, the best on the market. There is no other machine like it outside of the other similar detectors made by Minelab. You know after it is all said and done it is the Explorer and the users of these machines that have the vast majority of really nice finds posted at the forums. I don't like to kick another guy's machine around but I don't believe it can be matched for depth and discrimination at depth. The technology takes a little effort to learn but pays big dividends.
The fact that we can use it in IM-16 or to accept or reject 1024 notches in an incredible number of combinations is a major advantage. If we want to use IM-16 with tone ID we can do so with confidence. If we want to only accept a single pixel on the screen for silver we can do that just and well. There is no other detector that will display ferrous and conductive content other than a Minelab which tells us something about the design. We pay good money for a good product. I am OK with that. It is when I pay good money for a poor product that I get upset.