bro github use it not mean its good or bad. They use because it perfect for their use case. same as php many developer say it is not good but facebook using it from long time and still php in their codebase because it match with their use case no matter slow or fast.
Arijit Singh
MERN developer
I think writing CONS without proper instance when you faced it makes no sense buddy. Just out of curiosity, on which application you found Ruby on Rails to be slow as hell ? According to you GitHub must be making a huge mistake running on Rails monolith. Lastly, don't spam a hashtag.