It was downvoted, because many people here want in person classes to be useless waste of time. They don't want to hear they are better then online. That is mostly due to high price of price of us college.

But imo, content issues are fixable, it just takes way more time. Good online courses with good content and good exercises will become more common.

What will be harder is to simulate the social effects and mutual communication, that will be fixable too in time. That will however require also changes outside of school - people will have to learn how to find friendships and communities without institutional support of school.