Well, I believe it is not necessary in general when using standard X server, as I described in <https://www.winehq.org/pipermail/wine-devel/2020-October/175561.html>, but that doesn't cover more exotic use cases where the X scancodes aren't fixed. Like @julliard replied in that thread, when using VNC X server for instance the scancodes aren't fixed anymore and we need that logic to figure them out. The problem, in my opinion, comes from VNC simulating incorrect scancodes, as it recomputes them from the VKey it received (the protocol only sends VKey and and it then assumes its client keyboard layout is US), but I agree that nothing in the X specification guarantees that the scancodes are fixed and that it makes some sense to do that kind of detection. Maybe an acceptable solution would be to make that layout detection optional, and configurable through a `winecfg` option, so that by default we'd assume a standard X server with fixed scancodes, and optionally we'd keep support for layout detection (or the other way around but I think improving the most common case as a default would be better).