TAA is kind of the foundation that almost all real time EDIT: ~~raytracing~~ frame upscaling and frame generation are built on, and built off of.
This is why it is increasingly difficult to find a newer, high fidelity game that even allows you to actually turn it off.
If you could, all the subsequent ~~magic~~ bullshit stops working, all the hardware in your GPU designed to do that stuff is now basically useless.
EDIT: I goofed, but the conversation thus far seems to have proceeded assuming I meant what I actually meant.
Realtime raytracing is not per se foundationally reliant on TAA, DLSS and FSR frame upscaling and later framgen tech however basically are, they evolved out of TAA.
However, without the framegen frame rate gains enabled by modern frame upscaling... realtime raytracing would be too 'expensive' to implement on all but fairly high end cards / your average console, without serious frame rate drops.
Befor Realtime raytracing, the paradigm was that all scenes would have static light maps and light environments, baked into the map, with a fairly small number of dynamic light sources and shadows.
With Realtime raytracing... basically everything is now dynamic lights.
That tanks your frame rate, so Nvidia then barrelled ahead with frame upscaling and later frame generation to compensate for the framerate loss that they introduced with realtime raytracing, and because they're an effective monopoly, AMD followed along, as did basically all major game developers and many major game engines (UE5 to name a really big one).
... What?
I mean... the alternative is to get hardware (including a monitor) capable of just running the game at an fps/hz above roughly 120 (ymmv), such that your actual eyes and brain do real motion blur.
Motion blur is a crutch to be able to simulate that from back when hardware was much less powerful and max resolutions and frame rates were much lower.
At highet resolutions, most motion blur algorithms are quite inefficient and eat your overall fps... so it would make more sense to just remove it, have higher fps, and experience actual motion blur from your eyes+brain and higher fps.