Sorry you feel this way. It would be nice to update the article with actual figures indeed.
And if I had to squeeze down the article, that'd be : "if you app doesn't imply repeated use, doesn't leverage context, takes room in your phone, if you don't have the necessary resources to develop it and update it on all platforms, and if it has to be integrated to a professional workflow for many users at once, don't go for it"
And if I had to squeeze down the article, that'd be : "if you app doesn't imply repeated use, doesn't leverage context, takes room in your phone, if you don't have the necessary resources to develop it and update it on all platforms, and if it has to be integrated to a professional workflow for many users at once, don't go for it"