None of these problems are really dealbreakers for a consumer-oriented file system in 2023. Not even ext4 supports CoW.
ReFS is Microsoft’s new file system meant for higher end use cases. It supports many but not all of these advanced features. Starting with Windows 11, you can actually boot off a ReFS drive, though I’m not sure that is a recommended configuration.
Have they? VRR support in Linux is still a total crapshoot in my experience. VRR doesn’t work at all with multiple displays in X.