MeteorJS cons?

Question

Node.js

Friends. Please explain to me the serious disadvantages in the development of meteorJS, what is so special about it that it is not popular among developers (maybe I'm wrong), but even googling, I did not find intelligible information on it.
If everything is more or less clear with the pluses, these are:

• Full stack development in just one language - JS
  
• so-called. reactive programming when lightning fast data processing happens
  
• And I consider it a plus that meteor makes a copy of mogoDB on the client side - the browser
  
• And the most important thing is the low entry threshold.
  

, then the disadvantages of all this are absolutely not clear. There are some good reasons why meteorJS is not as popular as AngularJS or React, for example. (Here I can compare the incomparable. So correct me if so).

Answer 1

reactive != lightning fast processing
meteor used to have its own template engine - inconvenient work with the front, angular and rect are now stupidly more convenient for the frontend
on the server side support only mongas, many don’t need / don’t like
it at all, all tasks are different and projects are assembled from bricks under its requirements, the meteor is not flexible enough for this.