PCSX2, the open-source PlayStation 2 emulator, has released its v2.7.158 development build today. This update primarily reverts a prior optimization related to graphics shader state management. Specifically, the change titled "Revert GS/DX11/GL: Optimize shader copies states." from pull request #14091 has been integrated. This action undoes a previous attempt to optimize how shader states are handled for the GS (Graphics Synthesizer) backend when using DirectX 11 and OpenGL renderers. The reversion suggests that the earlier optimization may have introduced regressions or instability, leading the developers to prioritize rendering correctness and overall stability in this latest development iteration.