Well known KDE developer Nate Graham is out with a blog post today outlining his latest Wayland thoughts, how X11 is a bad platform, and the recent topic of “Wayland breaking everything” isn’t really accurate.
“In this context, “breaking everything” is another perhaps less accurate way of saying “not everything is fully ported yet”. This porting is necessary because Wayland is designed to target a future that doesn’t include 100% drop-in compatibility with everything we did in the past, because it turns out that a lot of those things don’t make sense anymore. For the ones that do, a compatibility layer (XWayland) is already provided, and anything needing deeper system integration generally has a path forward (Portals and Wayland protocols and PipeWire) or is being actively worked on. It’s all happening!”
You are right in spirit.
It was not sysv to systemD, and it was forced (by making udev not work without it).
Other then nvidia, wayland is still missing some protocols (example: what virtual desktop you want your window to be on). But those protocols are (still) being worked on. And you will always be able to run x11 programs on wayland.
The advantages of wayland are a more direct path to hardware, and trowing away lots of code.