The future of independent thought is not in social media.
Social media has become Marx's great Opiate of the Masses (religion, move aside), a drug which lulls the mind and spirit into a dull state of consciousness that make one prey to the rising and falling tides of majority opinion. It has become the great weapon of opinion, the great "Grass Mowing Sword" of Japanese legend, scything down people and opinions and institutions - anything that is not considered socially "correct". It values conformity above independence, right mindedness (as defined by social media) instead of thinking, and entertainment about pondering.
So where is independent thought moving to?
I do not have a full understanding of this yet. In some cases it exists on blogs but as many have pointed out, blogs are in many ways the technology of yesterday, a slowly dying medium of communication. Perhaps it may it exist in books as well, thanks to the growth of the self publishing movement - but again, there is a an argument to be made that books as well are a passing medium.
But I believe that both of these still hold promise, as do podcasts (which I do not often follow) and other direct to reader technologies I am not aware of. Why/ Because only these allow people to generate and complete thoughts instead of just creating visceral emotional reactions.
Just because social media is causing a drought of independent thought does not mean such thought is going away. It is just going underground like a river through rock, only to percolate up and emerge at a point where it least expected.