Remember that the numbers on the states are net numbers. If Texas has 500,000 Gen Z emigrants and 511,000 Gen Z immigrants, that only shows up as 11,000 here while still meaning a vastly higher proportion of Gen Z migrating across state lines. If every state paired up with one other one and exchanged 100,000 Gen Z people, you’d have 5,000,000 Gen Z migrants but every state on the map would show zero