I had a handful of laptops at work that were briefly on 17.10 (because 16.04 had a showstopping bug for them) and the graphics were a complete headache until I switched them to X. Luckily 18.04 reverted to X and made my life easier.

I've never had problem with it; but then, my laptops have all Intel GPU and my only desktop with AMD GPU handles it nicely too.

Chances are, that you are using modesetting X driver anyway (i.e. the KMS driver, the same driver/backed, that is used by Wayland).

Fedora is a bleeding edge distribution whose sole purpose is to test out new features.

Sort of. It falls back to X for drivers that don't support Wayland, which has included nvidia for a long time. (Maybe there is some progress there more recently.) And the proprietary nvidia driver is widely used.

Does it really? I had grotesque lag when installing Fedora on a System76 laptop with an Nvidia card and had to switch to X manually.