I also heard about someone recovering to full health after a few months on rituximab. But then after participating in a physically exhausting reality tv show she fell back into it, but a new dose of rituximab brought her to full health again. I have found this case particularly interresting because it would mean that autoantbodies alone are able to produce the full range of me/cfs symptoms. She was diagnosed as a "classic" case of ME.
Fluge isnt sold on the idea that rituximab doesnt help some subgroup of patients to some degree, and iirc Scheibenbogen wasnt fully happy with some of the methodology of the study. Fluges speculation nowdays is that instead of a particular autoantibody being the problem there might rather be some type of pattern or a myriad of "functional" autoantibodies going on that refuses to stop. Something like wang et al 2021
where lots of immunomodulating proteins (and others) are targeted by autoantibodies.
That said there is also the problem with rituximab that it cant take out all antibody producing cells, like long lived plasma cells will remain and could be producing the rogue antibodies.