Some businesses cannot afford to optimize the code because the requirements are kept changing/unclear. Any attempts to optimize will be obsolete in some years.

Some businesses cannot afford to optimize the code because the requirements are kept changing/unclear. Any attempts to optimize will be obsolete in some years. It's worse when the project is outsourced to vendors, since time used for optimization is a wasted cost for vendor, while business is unlikely to pay for optimization unless it's really severe.