I agree with Old Salt that the fish finder changed the way I fish.  I don't use the devise to find fish, but to know how the structure changes and how deep the water is.  I don't bother with weather forecasts as I get what information I need by looking at the sky.  I do not take anything to keep in touch with home as that changes the tone and feel of a trip.  But I don't begrudge someone else using whatever technologies they want.