Notepad++ is an alternative to Vim, so if you are using Vim you are covering most use cases of Notepad++ already.
In Windows i use Notepad++ so i don't have to use Vim (which is for me the only viable alternative of a lightweight "programmer's editor" and what i used for a while before learning about Notepad++ - everything else, like vscode, emacs, etc feel much more heavyweight) since i dislike its modal nature and non-standard[0] shortcuts.
[0] i know that technically they predate whatever Notepad++ uses but pretty much everything else (including on KDE, GNOME, most X11 toolkits, etc) uses the same or similar shortcuts and keys as Notepad++ so who came first is moot, it is what i am used to that matters
In Windows i use Notepad++ so i don't have to use Vim (which is for me the only viable alternative of a lightweight "programmer's editor" and what i used for a while before learning about Notepad++ - everything else, like vscode, emacs, etc feel much more heavyweight) since i dislike its modal nature and non-standard[0] shortcuts.
[0] i know that technically they predate whatever Notepad++ uses but pretty much everything else (including on KDE, GNOME, most X11 toolkits, etc) uses the same or similar shortcuts and keys as Notepad++ so who came first is moot, it is what i am used to that matters