We’re getting well away from the topic now. It depends on what you mean by “replace”. Railways and canals exist side-by-side as different solutions to similar problems - sure. And some railways have replaced some canals. But the panama canal will not be replaced by a railroad for example. It couldn’t do the same job. The pros/cons of each option depends on many factors.
The analogy is poor for comparing software. Linux distros will likely replace X11 with Wayland over time. To do the same thing that X11 was doing. It will be replaced “in place”. The very same thing you were using with X11 will now need to work on Wayland. This would be like running your barges on the railroad? Maybe? Depending on how you squint?
I wouldn’t expect my barge to work on the railroad. I do expect that Firefox will run on Wayland after having used it on X11 for 20 years.