You bring up an interesting topic…
With the advancements in electronics, why would one choose a flaser over a graph? I could see a flasher at the bow with the trolly motor (for those who enjoy them and well-versed in intrepreting the flasher), but at the console? I prefer a graph/GPS like the Garmin GPS depth sounder combo… even if there is no GPS, a graph seems more useful, as it tracks your path and you can have a visual representation of the bottom contours over a designated time period, whereas the flasher only is real time. Besides, the Garmin units have a “flasher mode” which provides the benefits of instantaneous feedback for bottom hardness, etc, but also the time duration of plotted information.
My boat has 2 Garmins, bow and console, both with the flasher mode going continuously… Just my 2 cents. Other thoughts?