The answer is simple: any of them will work just fine. npm 5 brings many improvements, a lot in performance (in my tests the speed between them are very similar), and new functionalities (e.g. outdated command).
The answer is simple: any of them will work just fine. npm 5 brings many improvements, a lot in performance (in my tests the speed between them are very similar), and new functionalities (e.g. outdated command).