Last year I busted my ass on a project with a pricetag measured in millions. 6 months later as we were finalizing the build and about to present it to the stakeholders was the moment executive leadership changed their minds and decided they didn't want it after all. We shelved the code and will probably never use it for anything else because it was extremely specific to that project, so unless someone in executive leadership decides they want the same thing again, it's just millions spent for literally nothing