No, there are definitely tradeoffs with TAA. Just… not extreme ghosting trails like the stuff you posted unless something is kinda glitchy. Which is where the weird layers of misinformation seem to be creeping out. You have a layer of people talking about how they find soft looking TAA images annoying and what seems to be an expanding blob of people attributing a whole bunch of other stuff to the thing as if it was the standard, which it absolutely isn’t.

FWIW, I took a peek at that subreddit and it’s mostly relatively informed nerds obsessing over maxing out for a specific thing (edge sharpness, presumably) over anything else. I was pleasantly surprised to see they’re not as much of a cultish thing where soft edges or upscaling are anathema and instead they mostly seem interested in sharing examples of places where temporal upscaling works better/worse than TAA.

Most of them are doing so in video so compressed it’s impossible to tell what looks better or worse at all, but hey, it’s at least not entirely delusional.