I've gotten by just fine with 2wd on this 70 hp tractor, but would want 4wd on anything much smaller. It's heavy enough that I can still pick up a ton, and the power steering works just fine even with a loaded bucket. If the ground is too soft for me to work without miring up, I leave it in the shed anyway. If it does get stuck, I can push it back out with the bucket. It clears the road of snow just fine with no tire slipping. It has wheel weights and 55 gallons of fluid in each rear tire. I would have had to pay several times what I paid for it to get one less than half this size new, but I can pick up some of those tractors with this one. It's been one of the best tools I've ever bought, and it still finds new uses every week.
One reason I went with a bigger tractor was pulling a box blade. The little 35hp would often get to the place that it couldn't pull the box, and you had to raise the blade leaving a hump to have to deal with, which could take many times longer to get things leveled out. With the 70 hp, it's "come on let's go" with not only a full 7' box, but even if stone is boiling over the top. I also have an 8' grading blade with a tailwheel that I can control with the remotes from the seat for swing, tilt, and offset. It's not quite a motor grader, but comes pretty daggone close for cutting ditches and grading a crown on a road.
I've built our farm with this tractor, and it's still ready to go and do it again. It's great for lifting plywood and roofing materials up to a roof.