Maybe "Harvard is different" but a friend went back to school (Metro State U in MN) a few years ago to get his comp sci undergrad after practicing for over a decade professionally. They were trying out online learning for full time students for many intro and secondary classes for the major, saving only the most "keystone" classes for live lectures held weekly.

The key thing was they required the students to respond to three questions for each class for each of the five days of the work week and those were graded. He loved this and excelled at it. He didn't want to sit in a lecture hall. The vast majority of the undergrads hated this and often blew off the questions. Many of them failed. Some A students were getting Cs.

There was a revolt, the students were angry and they decided to ditch the online learning and go back to traditional classes...