But these systems do work - it's just that they don't necessarily scal as well as others. It's silly to expect that every single software project requires the

But these systems do work - it's just that they don't necessarily scal as well as others. It's silly to expect that every single software project requires the same level of correctness or maintainability. A rapidly-developed speculative SaaS for example may be able to trade long-term maintainability or scalability for faster development time (often more important if you have no idea whether or not your idea will even work).