Very sad that they have cut this film, I secured 15 rolls of expired plus-x from eBay a couple of weeks back and I just ordered 20 rolls of 35mm from Germany.
I am fairly new to analogue photography and tried the first roll of plus-x 35mm a couple of days ago and I was pretty stunned by the feel of the resulting photos from Tetenal Ultrafin, how can they discontinue this film??

I hope they sell the patent to a company that is able to produce it in 120 format, as far as I know, Arista premium IS plus-x (?), but not produced in 120 format....someone should kick their butt and get them to produce it in that format as well.