Migrations tends to involve deleting lines too. A 200 line change typically doesn't grow the code base by 200 lines. I believe in my 2.5 years at Google, I've

Migrations tends to involve deleting lines too. A 200 line change typically doesn't grow the code base by 200 lines. I believe in my 2.5 years at Google, I've actually deleted more lines of code than I've added.