files is now deprecated

[OshinoMoumou]

Greetings!
I noticed that method POST referred a StackOverflow post, while a recent comment to it mentioned that the files API has been deprecated, and so this answer will cease being valid from then end of July 2015.
I'm trying to learn the usefulness of such small updates on StackOverflow. Would this comment help improve your code? I understand that such defect might not happen in real life situation. In that case, do you think this comment can help prevent future bugs (for example, when the code were reused somewhere else)?
I'll really appreciate it if you could kindly give me some feedback or suggestions. Thank you very much for your time.
Have a nice day!