Late-night hustle culture may still be glorified in some corners of the tech world, but not everyone is buying into it—especially not billionaire entrepreneur and longevity advocate Bryan Johnson. The 46-year-old tech mogul, known for his extreme anti-ageing lifestyle, recently called out an Indian software engineer who boasted on social media about working until 4 a.m. "It's 4 AM, guys, but builders are building. What’s your excuse?” the programmer posted on X (formerly Twitter), celebrating his grind.Johnson, however, wasn't impressed. "It may feel heroic," he replied, “but you’re spending down your human capacity.” He went on to explain the physiological cost of burning the midnight oil: a 30% reduction in brain oxygen, suppression of melatonin due to blue light, disrupted deep sleep, and impaired insulin sensitivity the next day. “The missed sleep raises cortisol, increases visceral fat, and decays memory,” Johnson added. His critique struck a nerve, triggering a wave of agreement from other users on the platform."No good code is being written at 4 a.m. and ruining your morning focus—the best focus of the day,” one commenter noted. Another wrote, “Whatever they are building now by staying awake will be built by an AI agent in 10 minutes, five years from now. What’s the point?" A third user summed it up bluntly: “The excuse is to feel good, rest, be healthy, and make better decisions.”Man Behind The MissionJohnson is not your average tech mogul. Best known for founding Braintree (later acquired by PayPal) and Kernel, a company developing brain-machine interfaces, he has poured millions into an audacious personal experiment: to slow, and possibly reverse, ageing.Through what he calls Project Blueprint, Johnson adheres to a meticulous regimen involving diet, exercise, and sleep optimisation. He follows strict health protocols, including unconventional methods like plasma transfusions from his teenage son—a procedure that has sparked both fascination and ethical debate.In a recent post on X, Johnson shared his detailed morning routine, which begins at 4:30 a.m. and lasts until 10 a.m. His day starts with monitoring his inner ear temperature, applying a custom "BP hair serum," and donning a red light cap. He then exposes himself to 10,000 lux of light to reset his circadian rhythm. It's 4 AM guys, but builders are building.What's your excuse pic.twitter.com/E83NyUCeIw— priyanshu.sol (@priyanshudotsol) May 24, 2025 ]]>Breakfast is a carefully curated "Longevity Mix" consisting of protein, collagen, extra virgin olive oil, and antioxidant-rich berries, followed by a personalised supplement stack. His morning workout includes strength training, flexibility drills, balance exercises, and either Zone 2 cardio or high-intensity intervals. Johnson’s message is clear: productivity shouldn’t come at the cost of long-term health. In his eyes, sacrificing sleep to meet deadlines is not a badge of honour—it’s a sign of unsustainable living. As more voices from the tech community question the glorification of burnout culture, Johnson’s warning serves as a timely reminder: no innovation is worth your health.