Depends on your use case, I've been using it for years now and am yet to run in to missing features. There are a few features x11 is missing like different dpi scales between monitors which Wayland does. Sandboxing with flatpak is another big one as well.
I'm a big Barrier user, which has no Wayland equivalent. I also frequently make use of X tunelling over SSH, which had no Wayland equivalent the last time I checked, although it has been a year or so since the last time I looked into it.
