Even among Paphs I don't think you can make the generalization that they all like to be repotted frequently, and certainly not for orchids in general. For most Paphs I would go with once a year mandatory, twice a year optimal. But choice of media makes a huge difference, and if you have any water quality problems more frequent might be better. I do think it is accurate to say that most orchids tolerate good repotting very well, and many would benefit from more frequent reptting than they get. Most importantly, the all too common practice of waiting until the roots are already rotting, and even then hesitating if the season is theoretically wrong or the plant is in flower, is just plain stupid. Repot long before the plant needs it, when the growth stage is right regardless of buds or flowers, not on a schedule.