The biggest advantages I like about my fat tire over my old pedal bike is the smoother and faster transition between surfaces, smoother ride for me, and the 750w boost from the throttle if I need the extra speed/power. Just on my work commute, I can ride broken asphalt, uneven concrete sidewalks, ride off curbs, a sandy to muddy dirt lot (depending if it rained), and hardpacked/sandy/rocky single track trail (if I take a fun ride detour). The throttle will be your best friend if you hit a deep sandy spot on the trail.
I actually became a much better ebike rider and really improved my skill sets the more singletrack tails I rode (especially at night with a good set of head and helmet lights).