I think that you're gonna be surprised then. XP will likely have to design a completely new multi-frequency machine or even use older technology like Garrett plan to, but only time will tell.
The proof of the pudding is in the tasting, you really should try a Nox out Cath that has been set up correct on one of your done to death fields. Any detector will find plenty but simultaneous multi-frequency will find so much more on both land and beach, has accurate target ID's at depth without lots of coke and iron, that is why I got rid of my Deus - so a win win! But having said that, some just don't like change so whatever suits?
But just to add : KB whilst the Nox does have several options, most people just do a quick noise cancel and get on, so basically a switch on and go!
P.s. Ooh, more smilies have just appeared!