I have an R5.1 and I have used the Pixel Shift mode maybe twice, just to see what it did. Like most cameras with this capability the scene has to be completely still, which is very rare for the type of photography I do (even architecture often has moving clouds or reflections). My Olympus OM-1 also has a similar mode with a similar experience.

I also do not want any AI generation in my cameras. I want my cameras to take the photo I told it to make, and not to fake a photo it thinks I wanted to take.