Looks like a pain in the ass to pull some of those jars out.
You can use a (sacrificial) backing board to prevent exit side chip out. Like where you drilled the dowel holes.
It looks like there's no finish on it, so the wood is going to get stained/discolored from skin oil, and probably cooking oil, specks of spices, etc.
If you think "this won't happen", look at the shelves inside your refrigerator... those get dirty, even though you "keep your hands, and jars clean". The difference is the fridge shelf has a durable finish that you can wipe clean, so the stuff isn't going to soak in.
But also--this is OC.
You could have posted another "PEX: why yes, I want my son to be a daughter" or "team yellow chads rise up", etc etc bullshit thread. But you didn't, so high marks there.
Overall you get a C+. But you can raise that to a B+ if you apply a finish.
Just my 0.03 CAD.