Holding back (TAF) on a better version of it's predecessor (TDF)...smells/tells like pushing the almost expired milk to the front of the display.
Nothing wrong with the merchandising aspect of these efforts... just makes it harder to reach the latest drop of milk...sitting in the background.

Just have to love the legalese...where litigators wallow.

Snake oil salesmen do it all the time. Money...Money...Money...makes the world go-a-round.