Quote Originally Posted by chip j View Post
My lab said the were using ID-11 plus when I started w/them some yrs back. I had no ida it was discontinued. I used lots of iit when I was shooting 100+ rolls during the spring & summer.
Evidently it was discontinued around 1995, as per this discussion list post from 1999:

ILFORD ID 11 Plus was discontinued about 4 years ago because it was found
that Cinnamic acid disulfide appeared to reduce the film speed of some new
technology films.