So you have inside knowledge of their business purpose in aquiring GitHub? Are you posting this in an official capacity as a representative of the company? Or do you not really know and just elevating your two cents using the name of your employer?
I’m commenting on the tech stack discussion, given my experience in the company and if GitHub joins, I’m 99.99% sure they will stay on the tech stack that they have today. Look at LinkedIn, it is still running on Scala.