Few quests are as hopeless as trying to restore the meaning of a term whose use has changed over time. I’m not talking (for once) about Customer Data Platforms, but the idea of a “martech stack”. Originally, the term was used in the same way as tech stacks in general: “ the collection of tools, frameworks, programming languages, and platforms used to build and run a web or mobile application. ”  Stacks were distinguished by their components: developers might choose a LAMP stack (Linux, Apache, MySQL, PHP), a MEAN stack (MongoDB, Express, Angular, Node.js), a WIMA stack (Windows, ISS, MSSQL, ASP), etc. Each had its strengths and weaknesses, and no doubt its fanatical advocates. But, while there was a general framework that defined the types of components in any stack (broadly described as infrastructure layer, database layer, application layer, and presentation layer), there was no particular sense of one stack being "correct".…