I think this needs to be emphasized more. There are many people who love Xorg, but there appears to be a big difference between development efforts between Xorg and Wayland.
Wayland would seem to be the future for Linux. By not embracing it now (speaking of distros and developers here), you are just slowing things down for no reason. System76 doesn’t have the bandwidth to do their own distro, their own DE, AND continue Xorg development.
Edit: I misspoke here, as Cosmic DE is natively supporting Wayland and will implement Xwayland for compatibility. This is great stuff!
They just don’t. So, I see this as a reason to avoid Pop OS, unless you are using their hardware. That being said, a good reason System76 gives that they are still supporting Xorg is because many of the hardware configurations they sell only work with Xorg now. To be clear this is only the case because the software they are using has not been updated to use Wayland. (NVIDIA is the biggest culprit here as well. There is a reason why Linus Torvalds does not have the kindest gestures or things to say to them.)