I use R4s and have no problem mowing fields in 2WD or playing in the snow in 4WD. I'm in the hills of NW CT, and we can get 8' drifts up here often and quickly. I need to keep the driveways and roads clear all the time as we board horses and need to be able to move them in an emergency.
My fields dont get abused at all with the R4s unless I'm in 4WD with a heavy load.
I have much more traction with my R4s than I do with my 3/4 ton 4x4 in the snow. I'm sure that chains on turf tires would give about the same traction in snow as R4s, and better traction on ice.
I wouldn't want to drive back in my shop with it's cement floors if I had chains on. Chains are a real pain to install and remove... they're heavy, they're dirty, they never fit the same way twice, and you need someplace out of the way to store them. Wear heavy gloves if you don't like blood-blisters from installing them.
I decided to go with the R4s because I do a lot of heavy work clearing woods and moving boulders, etc..., and the R4s really stand up to a beating. No complaints at all from them.