Some of us would rather maintain our vehicles properly and keep them 2-3-400k miles than be replacing transmissions every 80k......
We drive all of ours hard, they all get the fluid/filter changed at 30-50k intervals.
One's over 500k miles, one's over 450k miles, one's over 400k miles, and my 18 is pushing 100k. Oddly enough, none have ever had any transmission issues and still shift perfectly.
Well, the wise Mr. Chrysler says in the manual of 2016 to change it every 60k if you are Police, Fleet, Taxi or frequent towing and every 120k otherwise...
The manual for the 4th Generation said there is no need at all for regular usage... I don't remember how frequent under severe duty but it was not 30 to 50k.
My first van (1988) had initially 198k miles and I changed it because I did not have any clue about what happened during the first 13 years of use... never had any transmission issues until it was gone at 270k miles.
The second van had initially 74k miles and I changed the fluid after 100k miles just because it had a leak and when I replaced the gasket I took advantage of the event... fluid was totally clean... never had an issue until it was gone at 186k miles
The present van has 75k miles and I don't have any intention to change it soon

Anyway, no damage to change it every 30k but in my opinion it is a waste of money.