Thanks for the compliment. I'd like to take a stab at your question as a novice of the business world.
For any business it starts at the top. I'm sure you know all about Elon Musk. Lots of adjectives to choose from. Self made, workaholic, inspirational, humble, a genius of engineering and physics, and I truly believe he cares about people and the future of our planet and species. Below I'll link a recent interview with Sandy Munro, an expert in the auto world. Listen to the level of detail Elon knows about his products. That matters. He's on the front lines with his workers whether it's sleeping on the factory floor or a conference room couch. If you're an average Joe on working on the line, that matters.
Product. It's got to be something people LOVE. I could go into all the reasons why, but I think you already know Tesla owners are fanatics. 1 minute behind the wheel, and I was hooked. I will never buy another ICE vehicle and will probably be a Tesla customer for the rest of my life. I'm not alone. Brand loyalty matters.
Times change and businesses have to be able to adapt. Tesla is heavily vertically integrated. They build the machines that build the machines. Batteries, unique alloys, power trains, motors, heat pumps, software, AI, and even seats and airbags. Very little of a Tesla comes from an outsourced supplier. Because of this they can change and adapt faster, easier, and with greater efficiency than any other automaker. How are other OEMs going to catch Tesla when they're dealing with dozens of different suppliers? They're the leader in the EV market, and that lead is growing for this reason.
Anyway, just my 2 cents worth. I'll also throw in the express version of the Battery Day presentation.