I really dislike TAA, especially on lower framerates. There's too much ghosting. I often switch it to a slower algorithm just so I don't get ghosting.
My feeling is if I can render at 4K I can just not do AA at all. It really looks quite fine without, at least for me.
It’s very strange. I had a vivid dream, only about 5 hours ago, where I was debating the drawbacks of TAA with some scientists in a lab (likely because Half Life has been in the news this week). I think I dream about rendering algorithms once every several years.
And now today there’s this post and your comment here in the front page.