How did Udemy get 5,000 courses online so quickly

The Quora link discusses the concept of "The Great Filter" in the context of the Fermi Paradox, which questions why, given the vastness of the universe and the high probability of extraterrestrial civilizations, we have not yet detected any signs of alien life. The Great Filter suggests that there is a stage in the evolution of life that is extremely difficult to surpass, which could explain the silence we observe. This filter could either be behind us, meaning intelligent life is rare, or ahead of us, indicating that advanced civilizations tend to self-destruct or encounter insurmountable obstacles. The discussion explores various possibilities and implications of where this filter might lie.