Last I checked, there were still issues with XWayland applications in SwayWM on NVIDIA proprietary, and you might experience issues with flickering or broken rendering since I don’t believe SwayWM has full support for explicit sync everywhere yet. Regardless, even if there were no known issues, I believe you would still need to pass the --unsupported-gpu flag, as the SwayWM developers are unwilling to consider proprietary closed-source graphics drivers “supported”, since it is difficult to debug issues with them. Unfortunately, NVIDIA support on Linux is in somewhat rough shape and will probably continue to be for a few more years. I would not recommend using SwayWM with the NVIDIA proprietary driver.
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