Regardless of the implementation, the fact that you have to use it in the first place instead of native windows tools speaks volumes about how useless windows is for development. I can not fathom how anyone can consider it anything other than an "escape hatch".
It's an interop layer to allow you to interact with GNU based operating systems from Windows. Linux (or Debian etc.) is the OS.
I have the Zsh terminal directly in the file explorer (slightly hidden in the screenshot), and also the KDE text editor (Kate). With the tab completion in Zsh, I often find it faster to navigate with "cd w-a/s/m/r/c/e/as<TAB><ENTER>" to go to "/home/symbiote/Workspace/work-app/src/main/resources/com/example/assets" than by clicking.
I also use KDE for the wide range of configuration options. From scratch, it takes me about 5 minutes to go through all the settings to put everything as I like it -- of course, this is only necessary on a completely new system, e.g. at a new job. On the screenshot, I think the only visible change from default is the ^^ and vv buttons next to minimize/maximize, which are "Keep this window above/below" toggles.
Invisible things are mostly keyboard shortcuts for moving windows around, mouse behaviour, auto-starting apps etc.