AMD has just published two new Unreal Engine 4 and 5 plugins that allow developers to easily add support for FidelityFX Super Resolution (FSR) 2.0 to their games.... AMD has released the FSR 2.0 Plugin for Unreal Engine 4 and 5.
Highly doubt it it will affect adoption rate. If UE devs cared about how games look, they would tweak/give us ability to tweak those atrocious default TAA settings. When changing these values with console, it literally takes 5 minutes to make blurry TAA mess at 1080p to look better even at 720p...
the only problem that theres too much lazy devs or they want to be paid by AMD to use it. if this is too easy then devs can add fsr to their games and let automatic updates to handle the rest, but thiis will not happen. One example is ubisoft which have both AMD and NVIDIA sponsored tittle but they do not add new tech unless they are payed.
And when you turn it off, it is still hard to look at image because every second pixel is a jaggy. Tweaked TAA in combination with tonemapper sharpen (usually not present in settings at all either, also adjustable) provides better image then FSR 1.0. Spoiler Just a hint for a value with highest influence in terms of ghosting and blurriness "r.TemporalAACurrentFrameWeight". You can easily find the rest if interested.