This seems like trolling more than a genuine question, but I'll answer in case it is genuine.
It makes it easier for fullstack developers since it's a single language both in the front-end and back-end. You only need to learn once how `JSON.parse()`, `atob`, classes/prototypes, etc. work, and not worry about language inconsistencies making errors.
It is decently efficient (not the best, not the worst), fairly readable (I'd say on the upper side). The three main disadvantages IMHO are:
- Its async nature is more difficult to grasp for beginners compared to one thread/request and then linear-ish work of some other languages
- Node.js standard library is optimizing for flexibility instead of conciseness or completeness, so there's quite a bit of manual gruntwork involved (not the worst of those mentioned though).
- Right now the ecosystem is in a major migration from `require()` to `import`. The last large migration like this was from Callbacks to Promises, and IMHO it went very well.
As someone who is very comfortable with Javascript, and was comfortable with PHP and Python back in the day, I would not trade Node.js for any of those. I am thinking most of the time about what I want to achieve in a coherent way, and not fumbling with pointers.