My main editor is vim. It notifies the user when a file you have open in a buffer gets modified on disk by another process. It explicitly gives you the option to load the file from disk at this time. I would not use a text editor which silently reloads a file because this could result in a loss of work.

Yeah Notepad++ asks you too. I don't know of any editors that silently discard changes by default.

While many editors will come and go, vi in some form will always remain. Once you "get" it, using anything else starts to become alien.