Good to know on the parts availability. I've been tempted by a couple of old IHs myself.
I just mean that for using a bush hog, a tiller, or a bucket, grapple or forks, a tractor like my MX4700 with a hydro transmission will be so fast and easy to operate. They're much more nimble and not having to use a clutch to reverse or change directions really adds up over the course of a day.
Now, obviously old iron ABSOLUTELY has its place, and that one Josh posted looks great. I'd love to own one like it. For hitching up to a heavy disc or a plow, heck yeah, something like that or a big old JD would be the choice over a hydro every time. These modern day large CUTs are a great compromise machine; they can do a reasonably good job at being a farm tractor, working in the woods, and also doing jobs that are better suited for a skid steer. But, will they last 50+ years like a Deere 4020 or similar machine? Probably not.