Guess it depends where you live
What thickness does a chunk of wood have to be before it should be split it seems to me that anytime i try to burn anything any thicker than 3 or 4 inches thick it just wants to smolder doesnt seem to cure in a year unless split . when do you decide a piece of wood should be split what thickness????
It gets just downright beastly hot where I am in the summer, if the stuff is stacked and you keep the rain off..it dries in one season just fine, split or not. Heck, there's folks around me don't split until they need it! They just keep a few days ahead, even the big rounds dry if stacked in the sun and where the wind can get to it.
Me, my rule is, small enough to fit in the stove, it don't get split. I cut lotsa small too, a ton of small.
Larger chunks get dropped in at night, or during the day. Only early morning and evening hanging out in the living room get real hot fires. Now heating season is longish, but we don't need hades inferno hot all the time either. Heck, it is 70 degrees here right now! Ain't got a fire going, but after dinner, sure build a little one, then throw a chunk on at bedtime.
We can get some cold, but it is interspersed with mild, just "cool enough for a fire".
We'll have some more decent cold in Feb, but by March, it starts to be getting to be gardening weather. That's my transition point when I switch and set the saw down for awhile. Through the next month I will still be cutting and splitting and stacking, and it all will be dry by next winter and burn great. I guess in real rainy and cold areas it might take two years drying If so, that's what ya do then! get ahead. I'm trying to do that anyway, I know I got more than a winters worth for next year done already, so everything the next month will be for the year after that. Eventually I want to be like 4-5 years ahead, not so much for drying, but just so it is done.
OK< just swiveled around to see what is behind the woodstove right now, I have chunks and unsplit from 1.5 inches to around ten inches thick. Most of it is around 5-6" thick. It's all dry, and comes from last year, a lot of it from last fall when it was still warm out, all burning fine. Now we have burned more than I budgeted, just guessing, but I have near two cords dry as a reserve anyway, looks like I will be hitting it soon, another ..week and half I'll start on that pile, maybe longer if the warm weather holds.