The deal with the touch screen is misunderstood. I have one, but I don't use it like my phone or even my tablet. Swiping, pinching, tapping... are all moves we're used to on our day to day tools... I've found on the chart plotter that I will use tap mostly... rarely pinch and swipe just to cue the drop down menu.
What I use a lot is the +/- button (rather than pinching)... just like you would on your button equipped unit. Tapping any place on the screen will locate the cursor... giving a lot of automatic info.. such as distance, heading, etc. then touching the +/= icon centers the screen on the new cursor point, then expands or contracts,,, there's no swiping or pinching to move the screen. If it's wet, you can lock the screen to wipe it off or minimize accidents. Things we do like measuring distance on a smartphone app are much simpler on a touch screen chartplotter...You don't have to switch into "measure" mode, you simply tap the landmark you want info on. With the old, button style chart plotter, you had to maneuver the cursor with the direction buttons or a knob...
Actually, these habits were developed from using the previous button style gps and chartplotters I had for many years. So you can use most of the old moves you did on the button/knob machines... and still enjoy the conveniences of a touchscreen through tapping.... identifying AIS targets for example.