Is full width axle swap worth it? What makes off-roading different? Do people just do it do get stronger axles? Post pics if you have full widths.

 

By widening the wheel base you get a lower center of gravity. But it all depends on your setup.

They can be stronger if you go with the right axles too. So if you want really large tires, they're a good option.

On the other hand, you will be making it difficult for yourself to get through tighter trails with those wider axles.

Everything depends on what you want to do with your rig.