The nowadays industry largely advocates for producing software that can be sold, rather than finished software. With unfinished software I refer to functional

The nowadays industry largely advocates for producing software that can be sold, rather than finished software. With unfinished software I refer to functional prototypes, or software that only implement functional requirements (features) rather than non-functional requirements (security, performance, scalability, configuration, stability, etc). In my opinion, selling unfinished software is a form of fraud and I expect that in the future it will become illegal.