> Trouble is if your company pivots and you have been doing Mainframe COBOL for 20 years - you might find transitioning to a new language hard.
Then you are not following the advice discussed.
Then you are not following the advice discussed.
At least, that's my interpretation of the article's logic mixed with what appears mainstream to me. There's a lot of room for subjectivity, but it's difficult to argue that Java/Android isn't an extremely mainstream direction.