Gregg Popovich is retiring after nearly 30 years with the San Antonio Spurs, known for his five NBA championships and over 1,300 wins.The Spurs, often considered boring but successful, focused on fundamentals rather than flashiness, a model startup founders should consider emulating.Startup founders should prioritize consistency over spectacle, like the Spurs' focus on team values and trust rather than media hype.Popovich's legacy of sustainable success through discipline and humility serves as a valuable lesson for founders in building enduring companies.