There isn’t a great alternative. SSAA is way too expensive, and old anti-aliasing techniques do not work well with shader-heavy games or really fine detail.
The fucktaa crowd would rather just live with really nasty shimmering and other artifacts of aliasing, or they have obnoxiously expensive setups that can drive SSAA or displays with really high pixel densities. Personally I think they’re crazy. I find most TAA implementations look way better on my 27” 1440p monitor than no AA.