The customers aren’t asking for new code. They are asking for new features and platforms –now. Customers couldn’t care less whether it was delivered via spaghetti code, alien spacecraft or a completely new product. While the code rewrite is going on, competitors who aren’t enamored with architectural purity will be adding features, platforms, customers and market share. The difference between being able to add them now versus a year or more in the future might be the difference between growing revenue and going out of business.
via Startup Suicide – Rewriting the Code « Steve Blank.