The difference is that the people who designed X11 were honest in their intentions. The authors of systemd, wayland, etc are not. I'll just leave it at that.
(I recommend staying far away from "X11libre" also, for the same reason, with no further comment.)
Monolithic stuff is OK too, where it makes sense. The kernel is monolithic. ZFS is monolithic.
(Yes, this system has ZFS support. The module is built in to the kernel. In time it will support booting from ZFS also, when I finish the initrd code.)
There is a clear, solid reason for everything this system is or does. I'm not a contrarian or a purist, just someone with opinions gained from long experience who is not happy with the direction mainstream Linux is headed. My system is a zen garden of bliss compared to buggy garbage like Ubuntu.
Really, it's like someone added a turbo button. Ubuntu and friends are so bloated, laggy, and slow. I regularly use this system on 15-20+ year old hardware. The default window manager is Enlightenment e16. It's snappy and responsive everywhere.
KDE, Xfce, etc are supported also and are noticeably peppier than on mainstream distros, just due to the lack of bloat, gazillions of daemons running in the background, etc. Out of the box, nothing runs by default. You enable only what you want.
Another inviolable principle is that no application is allowed to originate or receive network traffic unless the user specifically requests it. There is ZERO network activity going on in the background. None of this steady stream of who knows what contacting who knows where that goes on with other systems. No auto update etc. No internet required or used during the system build. Python module installs do not consult the central repository or download anything. Meson or cmake does not download anything. Etc. All that's patched out and disabled.
It's a distro that is meant to be forked. It's very easily done. It's a blank slate, a vanilla Linux system with subtle and tasteful improvements that is the ideal starting point to customize to your exact specifications. If you want to add in systemd and wayland, fine, I don't care, it's your system and you can build it according to your desires. People can use this platform to build their own custom OS and save themselves a ton of work vs. starting completely from scratch.
It's a system that can be audited. Everything is built with shell scripts, starting with source archives and patches that are applied during the build process. It's all inspectable and the process can be understood step by step.
It's a way to hit the ground running with a full featured, working system, while learning in the process. This distro will teach you what LFS would teach you, but with less of a "sheer cliff face" learning curve, letting you focus more on higher aspects of building the system while still learning the low level details in time.
The build is actually overall simpler than LFS despite being way more featured, with things like Ada support. (Yes, it has GNAT.) I just found a way to do it better, and kept iterating countless times to simplify and improve to the max.
Existing systems did not satisfy my requirements or standards of quality, so I just had to create a new one.