IMHO the security advantage of Wayland is mostly a myth and probably the same is true regarding tearing. The later is probably more an issue with respect to drivers and defaults.
On my desktop computers and on most of my laptops I have never experienced tearing in X11, at least during the last 25 years, using mostly NVIDIA GPUs, but also Intel GPUs and AMD GPUs.
I have experienced tearing only once, on a laptop about 10 years ago, which used NVIDIA Optimus, i.e. an NVIDIA GPU without direct video output, which used the Intel GPU to provide outputs. NVIDIA Optimus was a known source of problems in Linux and unlike with any separate NVIDIA GPU, which always worked out-of-the-box without any problems for me, with that NVIDIA Optimus I had to fiddle with the settings for a couple of days until I solved all problems, including the tearing problem.
Perhaps Wayland never had tearing problems, but I have used X11 for several decades on a variety of desktops and laptops and tearing has almost never been a problem.
However, most of the time I have used only NVIDIA or Intel GPUs for display and it seems that most complaints about tearing have been about AMD. I have always used and I am still using AMD GPUs too, but I use those for computations, not connected to monitors, so I do not know if they could have tearing problems.
On my desktop computers and on most of my laptops I have never experienced tearing in X11, at least during the last 25 years, using mostly NVIDIA GPUs, but also Intel GPUs and AMD GPUs.
I have experienced tearing only once, on a laptop about 10 years ago, which used NVIDIA Optimus, i.e. an NVIDIA GPU without direct video output, which used the Intel GPU to provide outputs. NVIDIA Optimus was a known source of problems in Linux and unlike with any separate NVIDIA GPU, which always worked out-of-the-box without any problems for me, with that NVIDIA Optimus I had to fiddle with the settings for a couple of days until I solved all problems, including the tearing problem.
Perhaps Wayland never had tearing problems, but I have used X11 for several decades on a variety of desktops and laptops and tearing has almost never been a problem.
However, most of the time I have used only NVIDIA or Intel GPUs for display and it seems that most complaints about tearing have been about AMD. I have always used and I am still using AMD GPUs too, but I use those for computations, not connected to monitors, so I do not know if they could have tearing problems.