@Suiseiseki oh you are a complicated one... you remind me of a French friend I had. I miss him.

>there have been instances in that there weren't any chains attached.
Can you name any?

I don't remember important ones atm so I'm just gonna go with DOS 4.0 and VScode which enabled the community to fork it and make VSCodium/Code.

>I'm talking that it comes with the "ability" to open GTK/QT applications to work with as if they were just another Windows program.
That is called an X server.

Yes, I know what's an X server, that's why I explicity said GTK/QT applications, if it's opening a X in the WSL background to render such applications, I do not know, sounds likely, and with the source available, it's another thing "the community" will be able to know.
But you are not opening any Windows Manager, you can't run startx or lightdm or any XDM, that was my point on running GTK/QT applications as any Windows program.

Finally, yes I'm using Bash because it's what I used since Slackware 10, only tried zsh for some time because customized and weird FreeBSD at work a long time ago.
My point was that you can change the shell to any as long it's POSIX compliant (fish, zsh, bash, etc.)