There may be more significant downsides.
Some preliminary work in the journal Computers in Human Behavior has linked social media information overload to depressive symptoms and reduced overall well-being.
More work has found that replay-related states — sleeping, downtime — may support hippocampal health in ways that strengthen emotional processing and counteract mood disorders.
The picture that emerges from all this work is that an overloaded brain is a confused brain — one that may be prone to lapses in memory, judgment, and emotion regulation.