Team players, mentors, software architects; they tend to be tossed aside to make room for coders who can churn out large amounts of code, even as the company's capacity to deliver and maintain features declines over time due to tech debt. Managers always love a developer who can consistently write 5000+ lines per code per week, regardless of how many features they actually ship and how many bugs they introduce.
As a team lead and engineer who has managed some complex projects, the idea of someone writing over 2000 lines of code per week terrifies me... That's over 100K lines of code a year. Think of the unnecessary complexity. There is a very good chance that the same feature set could have been implemented with just 10K lines of code, less buggy and in half the time though that would only amount to 380 lines of code per week! Management won't like that.
I tend to think that the dev who can churn out thousands of lines isn't thinking deeply enough about the long term direction of the project; all the code they're writing is essentially throwaway code.