From my experience here what eventually happens is that the people in each class gradually dwindle leaving a small number of people who get to know each other quite well. Personalities come through clearer and their stories are easier to follow. Mutual caring gets deeper and help becomes more (I don't want to use the words genuine or sincere) individualistic. It hurts a little more, cuts a little deeper when someone you've bonded with over a few months suddenly disappears. Our success if sort of tied up with the success of others; peer pressure in a good way. We don't want to let others down never mind ourself. At least this is how I've experienced this site.
Juno, we've discussed this in the past, even way back in 2009, and tend to agree.
Lastly, all this "Back to the future" news is making me happy, sad, feel old and feel nostalgic. All in all nice memories.