Behind 3 Million Sales, Flyme Auto's Engineering Debt Is Just Beginning

Flyme Auto has surpassed 3 million cumulative sales across partnered vehicle models, with 143,000 new units added in June alone. This figure already places it in the top tier among in-car systems. But as an engineer who deals with code and test coverage daily, what I care more about is: are these 3 million cars running the same codebase? How much abstraction was done for adapting to different vehicle models? If every model forks its own branch, maintenance costs will rise exponentially.