Phase 1: You are making very little money. You are excited when there is free pizza at an event, because you got a free dinner.
Phase 2: You are making a decent salary, enough to survive quite comfortably, even in a pretty expensive location. In tech, often this salary is enough to make you a millionaire if you just invest it conservatively and wait a decade.
Phase 3: You are still making that decent salary, but now you are also a millionaire on paper. Your stock is worth millions of dollars, but that isn't directly relevant to your daily life.
Phase 4: You have millions of dollars in liquid assets.
I have worked with a number of people who have gone through each of these phase changes. In my experience, going from phase 1 to 2 is by far the biggest change. After that, things just don't change immediately. You might move to a nicer place to live, or have enough money to become an investor or leave the conventional career track, but those things happen slowly.