While I like your set up, I never understood using a 25K piece of equipment to do the job of a 1K piece of equipment. Not to mention the extra wear and tear on the 25K piece. But to each their own.
You must have an OWB to use those big chunks in.
I totally understand your point. There are absolutely pros and cons to using the tractor to power the splitter. I do want to note though, that I rarely use this tractor which did cost 25k but almost exclusively use a smaller 30hp New Holland that I paid $5500 for. So, that mostly alleviates the concern about putting wear on an expensive machine. I'm only running it on the Kubota in the video so I didn't have to just haul both tractors to the job. For that matter, I could run it on the Ford NAA I just bought for $1200, in which case I'd trade a stationary unit with it's own motor for a splitter that's self propelled. And actually, though I absolutely require tractors for my business (growing vegetables), I don't use them a ton, so putting some hours in them using a splitter isn't an issue. That Kubota is 4 years old and has 370 hours on the clock. I figure it's probably good for them to get run at high idle with a moderate load for a few hours to get everything up to temp and let some water cook out.
For me though, there are a few reasons for the tractor mounted splitter. Price, I saved a lot of money by buying a three point model. It was a stretch for me to buy that model as it was, so adding a couple grand for a motor and axles would have been a deal breaker. Noise, I hate standing next to a screaming air-cooled 4 stroke. Chainsaws don't bother me, but I'd much rather be 10-12' from a diesel than 2' from a lawnmower engineer for hours at a time. The Kubota in the video is a little loud, but that NH just purrs. Lastly, with a big commercial grade splitter like a timber wolf or Wolfe Ridge, it's gotta be hooked up to something to move it around anyway. I don't have a 4x4 truck or a quad, so I'd probably end up with it hitched to a tractor anyway.
Don't get me wrong, I'm not saying they're better, or everyone should have one, just that in my case it works.
Oh, and I'd be remiss if I didn't thank
@Sawyer Rob for all his great pictures of his splitter in action which really convinced me to go with a three point splitter.