> Its definitely the same on Windows as it always was, which is the platform I most developed games for. Not really. Most games use "borderless windowed" mode

> Its definitely the same on Windows as it always was, which is the platform I most developed games for. Not really. Most games use "borderless windowed" mode instead of fullscreen exclusive, and even FSE is not true exclusive mode anymore in most cases. https://devblogs.microsoft.com/directx/demystifying-full-screen-optimizations/ https://devblogs.microsoft.com/directx/demystifying-full-scr... > When using Fullscreen Optimizations, your game believes that it is running in Fullscreen Exclusive, but behind the scenes, Windows has the game running in borderless windowed mode. When a game is run in borderless windowed mode, the game does not have full control of the display– that overarching control is given back to the Desktop Window Manager (DWM). see also https://learn.microsoft.com/en-us/windows/win32/direct3ddxgi/for-best-performance--use-dxgi-flip-model https://learn.microsoft.com/en-us/windows/win32/direct3ddxgi...