Sometimes, even when the system is no longer relevant, it needs to be supported while a replacement is being built. Here, I would like to cover some factors that we need to account for, so we have a plan for system maintainability.
In the software life cycle, the longest stage of the application is maintenance. Once the software is developed, it will evolve over time because of changes in the market, business, or even the software itself.
In the olden days, developers only have the luxury of alert, confirm, and prompt dialog boxes. Then, lightboxes which became popular around 15 years ago.
In most jobs, the expectations for software developers are that they must work in a fast-paced environment, should be able to juggle multiple tasks at once, and maintain the same level of productivity.