Now,almost every minecraft users use forge.

If forge add function to apply cape when we use forge, It will be awesome and everyone can use their custom cape!

Add some upload place like forge forum to upload their cape and use that cape skin to customize cape.

And give an option to turn on/off their cape.

 

Is it possible? I think it is just a moral issues.

 

If you want it that badly, then either write your own cape mod or find an existing one.

As diesieben said, we won't do anything on capes.