I have just repotted mine, after several years in the same pot. Roots were starting to come out of the drainage holes, and the plastic pot was distorted into an oval shape by the many roots.
It will be much happier in it's new pot, I think. But I have a question. My plan was to separate the several plants. But I chickened out at the last moment and just moved the whole mass into the new pot. Could I have cut them apart with a knife and dusted the cut ends with something (what?)