The update for Gmail allows you to add the files from your Google Drive storage of up to 10GB but do you want or have some sort of reason to send such a very large file like that in your mail?
In addition, using the Gmail forgotten attachment detector, Google will detect if the file you send from Google Drive is shared with everyone or not, you'll be prompted with the option to change the file sharing settings without leaving the email and especially for the links that lead to the files from your Drive storage.
So start messaging your friends with the content taken from your Google Drive storage after the update has rolled out in the next few days.
