Doomed to run hot under some driving circumstances. But the owner can at least partially mitigate the potential consequences by changing the fluid more frequently and checking the transmission filter screen for blockages every 2nd or 3rd fluid change. By contrast, planned obsolesence is engineered into most American car automatics built since the late 1970's (via inferior quality internal seals, inferior clutch friction material, inferior gear metalurgy, etc.) and no amount of fluid or filter changing will enable them to last 300,000+ miles like all Toyota automatics can.
I would not be so quick to get down on American cars I had a 1995 Saturn SC2 with well over 300,000 miles on it before I sold it. That transmission had a twist on filter that could be changed easily. It did not shift as smooth as my 99 RX 300 but it never leaked or cost me $5000 for a new tranny.