Remote access is a good example. I am actually working right now on getting tail for remote servers working in [redacted]. FTP tailing a file is a special feature because you do not want to redownload a 1GB file every 3 seconds. The idea of a forward read-only file is a special concept. If I am using Notepad++ as a text editor, I want it to download the whole file because there may be important changes to the beginning of the document. If I am using it as a log viewer, then I need to provide a special configuration to the FTP agent. Not impossible, but the overlap in behaviour for the tool can be confusing. The additional configuration makes it harder when using it as a text editor and harder when using it as a log viewer. It starts to make the tool less useful for both tasks.
Now add additional features like grep, merging files, very large files (4 GB+), etc and it becomes clear that Notepad++ is a text editor. It is a fantastic tool, but not fit for every task.
Disclosure: I am the author of [redacted].
I got into the habit of using it to open HUNDREDS of files at the same time and perform ad-hoc interactive searching and data extraction to prep for further processing in R.
I've not seen any editor that can work effectively with so many files totaling a huge size. Would like to try Emacs for this stuff someday but Notepad++ works great and is easy to use.
For using the tail feature with remote files, have you tried it through the ftp notepad++ plugin? I'm not in front if my pc right now so I cant test it myself...