I love my D3400 !
Full disclosure, I was one of those people who would snicker when I'd read folks complain about the size and weight of the heavier bodies. (D700,D500, D810, D3, etc). And those are the types of bodies I've always used. But then I bought a D3400 ! Alright, it's not going to replace my D500 (AF is the first thing that jumps out at you) or my D750 for that matter. But it certainly has it's place as another tool and so far I am loving the small size and weight as a carry along. It's low price means I can just leave it in a bag in my van with no worries so it's always available. And it's more than capable of fine images when used within it's limitations. Here's a few from the short time that I've gotten to play with it.
All with the 18-55 AF-P VR and 70-300 AF-P DX VR