No matter what I'm driving, I use 2wd as long as possible. I figure it's easier on all driveline components. Also steers easier and more effectively. Now if I can tread more lightly in 4wd, like the trail is soft and fragile, I'll then use 4wd. Also, if backing uphill, 4wd is mandatory. Steep climbs are another great use for 4wd.
Last weekend two buddies and I rode. All three in polaris rzrs . I didn't use 4wd at all except for backing uphill when turning around on a blocked trail. One buddy said he tried 4wd for a while and didn't like the steering. Other buddy ran 4wd all the while . He thought he needed more traction to tame his turbo, even though he was the slowest guy. Or maybe he was slowest cause he couldn't steer as well in the tight woods trails, in 4wd.
With the talon R, it's even more essential to stay in 2wd, cause if I lost any maneuverability I'd crash it into a tree. These private trails are within two inches to both sides of the R, in many places.
P.S. I don't ride mud. We try to respect the trails and keep from wrecking them, so we don't go when it's real wet. Plenty of other stuff to do.