the NTSYNC change is for video games, doesn't help VS

I saw signs of both human and LLM authorship, so it's probably at least not slop. It did take me out of it a bit though, yes.

At least for the last decade Visual Studio and Photoshop ran just fine on wine.

Linux runs VS Code just fine. If you mean the larger Visual Studio suite ... why on earth would anyone want to run that garbage pile on Linux?

Why?

No, the gains here aren't very dramatic when compared properly (against fsync), and have nothing to do with AI help. The gains come down to Linux kernel support for certain synchronization primitives like the Mutex on Windows, such that there is a more direct mapping of what a Windows binary expects to what the Linux kernel provides. See https://docs.kernel.org/userspace-api/ntsync.html for the kernel support that makes this possible.