Great info, thanks for posting. I never bought the transmission fluid flush sales pitch. The first time I heard it, the guy said “...so you can see that YOUR fluid is losing its nice pinkish color.” Sheesh.
As the author states, most cars sold today use synthetic ATF which is far more resistant to thermal breakdown (the main cause of tranny failure) than conventional fluid. Unless, you use your vehicle for frequent towing, synthetic ATF can easily last 150K miles.