I was thinking it might help the other undocumented RPI by matching Dreamer RPI. So maybe the courts can rule that undocumented RPI can apply for citizenship after their 10 or 13 years like what Dreamer RPI's get after 5 years.

I don't think other undocumented RPI can even apply for anything since they have to go through family, employment, or merit based visas since they don't get their own line. A favorable ruling can change that.