2.1 practically includes AA. It upsacles image for performance AND "smooths" the edges at the same time. Plus do it both more sharp than TAA, and doesn't have disadvantages of SMAA, MSAA, and other methods that can't negate pixel jaggies entirely.Well you do need a TAA implementation to do DLSS, so everyone would win, regardless card.
Check enhanced edition of Metro Exodus. Game practically have only "Raytraced Global Illumination" and DLSS 2.1. TAA, ambient occlusion, and all fake lights removed. As such game both look stunning (shaming even such titles as Cyberpunk and HZD), and despite more intense "infinite" raytracing (vs original single-reflection RT), it actually runs very smooth even on ultra settings.
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