more and more manufacturers are phazing out the automatic with a dipstick and for why, dont know for sure but heres a couple of possibilities.
1. rules out the possibility of joe shmoe know it all to put motor oil or windshield washer fluid into the tranny
2. they make very good automatic transmission fluids these days that should be capable of lasting the lifetime of the transmission.
3.it makes you optionless when you do have a leak, now you cant just keep driving and topping it up every so often when you have a leak(dumping tranni fluid all over the earth and when it does go dry and you pile up the differential unit on the highway and lock both front tires and skid into a minvan full of school students killing them all you cant sue the car company for making a transmission that you can just keep topping up.
4. dealers trying to corner the market so only they can have the capability and knowledge of how to fix thier own cars
i really dunno