RIFE 4.9 needs to be added to SVP, maybe even as a third option @Chainik
I already added it as a replacement to 4.4 so I can do some testing over the last few hours. There are some great improvements in artifact masking, and unlike version 4.8 (which was a lot more demanding), version 4.9 for example works with my RTX 3090 at 4K without dropping any frames in most scenarios (GPU utilisation though is at 100%, but I do not drop any frames with it, except in some content), so it is still more demanding than version 4.6
Tested a few scenes I have saved, all have improved:
Farm field at the start of Equalizer 3 with the panning shot in the air over the car. The fences flickered before, now they do not flicker.
Season 8 Episode 1 of Game of Thrones, the first few minutes after the intro there are a lot of spikes, arrow helmets, trees, and other factors that introduce artifacts all combined with many panning camera shots, all have improved. Little to no artifacts in those scenes.
Some scenes in the movie Air have improved as well.
Beginning of Tenet there are improvements to fast movements, strings from guitars being broken, etc
However, extremely challenging scenes still show visible artifacts. It's not perfect, but I think 4.9 is a big enough improvement over 4.6 that it warrants being added into SVP as an update. But it shouldn't replace 4.6, because it is more demanding, so preferably as its own option as a 3rd selectable.