My Dad used an ATV till he was in his early 80's. My cousin, on the other hand, quit ATV'swhen he couldn't get his leg over the seat. The Cuz went to a Bad Boy buggy and loved it till the Louisiana rainy season came. Then he realized that electric carts, no matter how jacked up, aren't good in deep heavy mud. He finally transitioned to a Japanese mini-truck, which was heavily modified for mud use. He had, and used, a new version JD Gator until his wife took it from him.
After watching all that evolve over the years, the electric is good if you don't have the deep mud or need a stout work vehicle. If you need gas powered, and a small vehicle is needed, the Yamaha Rhino is good in deep mud but is marginal as a work vehicle. As for other vehicles, there are plenty to choose from and I guess what you need depends on you. Pretty much anything will work fine for you if don't have to factor mud into your decision.
If you do have the deep mud, then a 4WD ATV will go where no side by side will go. I have an old Yamaha Big Bear 4WD that I have taken everywhere, and I have never gotten stuck. The winch on it has been used a lot to unstick other folks' vehicles and our Kubota UTV900 (which isn't a mud machine).