Not a problem for obviously-correct changes of a couple of lines, but most PRs aren't like that.
Open source developers are not required to spend their time prioritizing your priorities. You just have to look to Xlibre to see that a lot of contributions are quite bad quality, and in a C codebase of Xorg's complexity and security profile it's not a small job to review things.
As it is, the community got constantly browbeat with 'this is the future' and 'it's so much faster!' when recent benchmarks have proven that to be false.
You'll probably find it to be a not great experience, since almost all the people who spend their time actually working on graphics and GUIs in the Linux world prefer to work on Wayland. So X doesn't get much love these days (and you're not entitled to their efforts after all). But it's not like they erased all the old X code from existence.
I'm confused where I'm likely to be suffering. If I start using Wayland tomorrow would I even notice? Apart from having to switch DEs, of course.