Similar questions can be asked > Why do so many developers use map/reduce instead of the database for select, pluck, math? > Why do so many developers use len

Similar questions can be asked > Why do so many developers use map/reduce instead of the database for select, pluck, math? > Why do so many developers use length instead of counting sql? The learning curve was easy, it was very compatible with javascript, it was very easy to install, it had similar features to sql lite.