Very true although it seems the side-by-side "ATVs" have taken over from the normal types.
In reality, the side-by-sides are not true ATVs as defined by the industry up into the late-90s. Up to that time, an ATV needed a single seat you straddle (like a horse), handlebars, and weigh less than 600 pounds. This kept the ATVs separate from the lawn tractors, golf carts, etc., in regards to liability and safety standards.
I believe the industry may have changed some of those specs as they saw growth of the side-by-sides and also some units having engines up to 1000 cc!
ps. I was an ATV riding instructor for 16 years.