I have never, ever in my career ever seen one "thrown away". Unless the project or startup itself dies, of course. Once something is built, and in production i

I have never, ever in my career ever seen one "thrown away". Unless the project or startup itself dies, of course. Once something is built, and in production in the hands of end users, it is something that needs to be maintained and built on and fixed over time. It's never thrown away. Now if you are lucky, it has been well-written and designed so that parts can be refactored over time as new features are needed and old ones deprecated. If it's shoddily built and rushed because you couldn't afford or couldn't be bothered to do it right the first time, then that's going to be tech debt you are going to have to deal with for years to come.