Disney animation is known for wanting series capped at about 70 episodes, IIRC. As opposed to the old days of Disney Afternoon stuff where they wanted that magic syndication number.
The old '90s-'00s rule was 65 episodes, because that way they could run the show as a 13-week weekday-daily and cleanly fit four shows per broadcast slot per year, while still falling well under the 100 episode threshold for syndicated reruns (which Disney did not want).
The current Disney rule is pretty consistent at 75 episodes on anything that isn't a runaway smash hit. I'm not sure why 75 is the magic number, although it *roughly* corresponds to 13 weeks at six episodes a week and still falls below the new syndicated rerun threshold of 88 episodes.