This is true for a 300-person Physics 101 lecture, but many many classes are discussion-based and don't work asynchronously. Professors are doing their best to

This is true for a 300-person Physics 101 lecture, but many many classes are discussion-based and don't work asynchronously. Professors are doing their best to modify stuff for this situation, but it's very hard to take something that's been taught the same way for 20 years and make up something new on the fly.