As noted above, the 8n is the forerunner of today's modern "CUT." The attributes and functionality that old man Ferguson designed for that tractor are still found on every small tractor built today.
Non live PTO? Okay? I've never operated a small tractor with Live PTO. So the PTO on these runs all of the time regardless of clutching? Really, that's such a big deal? When I hit the clutch, to presumably halt travel, the power to the implement is also cut. If you're stopping to avoid an obstacle......that's a plus. If you're changing direction, i.e. shredding, you hit your clutch and make your shift and ease out and keep the momentum. Not hard.....at all. And, of course, I have ORCs on all of the Fords I run.
No power steering? The 8n is light on the front by its design. Slap a mounted implement on the back and it's even lighter. In fact, the heavier the implement, the steering wheel may need a little turn brake pressure to point the nose. Again, not hard at all. If you need to ask what "turn brakes" are, well, then don't even bother, please.
If you need a loader tractor, no the 8n is not for you. You see a few with old loaders but they are ancient designs with limited functionality. They are limited capacity, fairly slow, and since the tractor wasn't designed for any such type of tool the design of the loader is compromised. Will they move 1/3 yard of material from Point A to Point B? Yes. Will they do it as quickly, efficiently, or easily as a modern loader? No.
Parts? New Holland dealers still stock parts for this tractor. I bought a replacement lift arm from a local salvage yard and they gave me my choice of 11 to choose from when I did. I bought an extra oil filter for mine from my local CarQuest. It's not an issue.
One thing we haven't even touched upon is fuel usage. The little flat four on the 8n will swing a 5' cutter on less fuel than any other tractor I know. The next generation NAA uses more fuel. My dad's Kubota burns more dollars doing the same thing. For the money, both purchase price and operation costs, it's hard to find anything that will handle more modern implements (minus the loader) for the money.
By the by, my little 8n has now suffered through two floods since it was completely rebuilt with nothing but fluid changes. It just loves to run.