Fasting, cold showers, and meditation? Can't read the full article but remember another article painting Dorsey as "extreme".
But to be honest, it's a reasonable reaction to stimuli that are unique to human history. The 24 hour propoganda news cycle, density with increased stressors, cognitive fragmentatiom due to the number of distractions, and an absolutely horrible dietary culture that will lead us to squandering trillions on treating entirely preventable diseases. Not merely monetarily but literally reducing the cognitive potential of entire populations!
I don't see the quackery in adopting working strategies against these challenges. Note, working strategies. Personally implementing the above 3 along with with weightlifting has been like feeling a cold mountain breeze after living in a swamp.
Nietzsche's remarks, on how the priests of the world have ignored and (gravely) trivialized
the 3 things that give arise to daily moral/cognitive judgement: Climate, Diet, and Habit, have been in my mind years after reading them. And their validity seems to flower the more experience life throws.