Earlier quoted context omitted.
Wayland is still buggier than a swamp. At this point they're no longer showstopping bugs, but if you don't want to be constantly annoyed by little things not working, X11 is still the way to go.
Buggier or not - it's too late to think X11 is the alternative. It's not. Wayland is going to get better for whatever is needed. X11 is absolutely not the way to go.
When Wayland will get better and apps start supporting Wayland more than they support X11, it will be the time to switch, but at the glacial pace Wayland advances, chances are that your current system will be obsolete when it will happen.
It is still a good idea to consider Wayland support for your own apps and have at least a test machine running it, but doesn't mean writing apps designed to work with X11 like this one is a wasted effort. X11 is here to stay, for a while at least.