Love my 34ton Champion log splitter. But it's slooooow. I think full cycle time is something like 9 seconds, been a while since I've used it. Then there's all the extra handling involved. But it's great when I'm doing gnarly stuff or oak or what have you, or when I'm already half burned out.
For the majority of the pine and Fir and such that I do for firewood, I can wade through it with an axe very quickly. I'm fairly young, fairly strong, and I've got a fair bit of experience. There's no way a hydraulic splitter is keeping up with me.
Never seen or used a kinetic splitter, just not a thing around here I guess. Heck, not many folks have splitters of any kind! They look nifty on YouTube, but that's all I can say.
Those atom splitters I have seen first hand, and those are super cool!
There's a video on YouTube of some cat that made a splitter type attachment for his backhoe. Kind of just a ripper claw and a brace for the other side of the round. He was doing boiler wood if I remember correctly, and was using the backhoe to pick the round out of a pile, then split it right into the back of his dump truck. I'll look for the video, I thought it was a good idea, that maybe someday I could adapt to my purposes. Seemed like it would save a lot of the handling that's such a killer with firewood.
I used to split in the woods, so I could get as much on the truck as possible, and eliminate all the extra touching. But unless its going straight to the customer, you're still gonna do it, so you may as well NOT max out your trucks capacity every trip, and just make one or two extra trips if need be.