the sad thing is that, IF at least they did a proper job, and did a full fluid change, that might be at least wrong but not too wrong, but usually they don't even do it, or they just turkey baster some out and refill. That's wrong.
When I did the fluid change on my maxima, it cost one container of atf which was 10$ or so, and took 15 minutes maybe, because I didn't know what I was doing.
Bacically, just umplug the return hose into a container, fill, and have someone turn the steering left and right while you refill. When the return line pours clean, whole system is flushed.... But, I did that at 200 000km.
IF you really want to play safe, you can just turkey baster pump out the reservoir, and refill. Once a year. Will keep it always fresh, for 10$ a year or less....
But how long do you plan to keep the jeep? if you keep for just 3-4 years, dont even touch it. Who cares.
My jeep is a 2011 and I havent even touched it yet, and you know what, I wont touch it for the next 3 years.
2011 Grand Cherokee Overland V8