When opening two documents with identical names (e.g. for comparisons using the Compare plug-in), it can be tricky to see which file is which.
A solution could be to have the "date modified" in parentheses on open files with identical names. (Or alternatively, put the "date modified" information in the status bar in the bottom)
An alternative solution I've seen in other applications is to include the folder name as well (like folder/file.txt. That does become a bit tricky if the files also have the same parent folder name, or the combination gets excessively long.
Here's how Visual Studio Code solves this problem:


If folder is named differently.

If folder is named the same.
It would be very much welcome to see similar functionality in Notepad++.
Interesting. The issue described here was one of the issues I had in mind (and mentioned) when I posted my somewhat related feature request a few months after yours (without finding yours back then): Feature Request: Temporarily Name Unsaved Tabs
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Here's how Visual Studio Code solves this problem:
If folder is named differently.
If folder is named the same.
It would be very much welcome to see similar functionality in Notepad++.