The original Notepad++ source code is written for the Windows API, built for Windows releases only. This project seems to be Qt-based, allowing cross platform development.
It seems like someone thought "building a Notepad++ of my own seems like a nice idea" and went with it long enough for it to become quite a competent editor.
This reminds of the guy I used to work with that used Notepad++ with Wine on Ubuntu as his primary editor and he seemed to get along just fine with it.
For Windows, how does this differ from Don Ho's original version? https://notepad-plus-plus.org/
What is the vision/goal of this fork? The README is minimal.