What’s the difference for a real user between using X11 or Wayland nowdays? I haven’t found anything useful on the internet, so I’m asking you. Internet articles on the topic (and about WMs too) seem to be advertising slop since they explain anything but the real things. Also, if anyone used the XLibre fork, I would love to hear about your experience with it.
I mean the ELI5 for the uninitiated is that X11 is older, and Wayland was made as the successor to X11. It aims to address issues that a lot of people had with X11. X11 is not in active development whereas Wayland is, and for support for modern tech, it’ll be added to Wayland but not X11. These days I’d advise to go with Wayland unless you either have hardware that doesn’t place nicely with it or you have a specific use-case for X11, i.e. Wayland unless you have a reason not to. Although most “beginner” distros choose for you without prompting you to pick, in which case go with the default (it’s probably Wayland anyway).
If you mean to explain the debate, basically some people have particular things they want to do, or they want to do something a certain way, and it’s not supported by Wayland, usually by design due to things like security concerns or philosophical differences with X11. X11 will continue to work for a long time but it’s not getting new features, so if these issues are a concern with you, you could stick to X11 for the foreseeable future.
The average user is not supposed to notice a difference (apart from maybe QoL differences like performance, screen tearing, etc)—that’s the goal of both projects. It should just display your desktop.