I was given an Ilffoprint machine when out two local newspapers amalgamated, I discovered taht earlt Ilfospeed worked percectly with it and formulated my own activator, I used fixer rather than stabiliser, Ilford never mentioned that Ilfospeed could be processed this way they wanted to sell their new Ilfospeed processors.
Ilford had a demonstaion for camera dealers during the short time I worked in the industry, at the time Ilfospeed came out.
they actually had a portable "darkroom" made out of tinted plexiglass so they could demonstrate the "New" process in an exhibit hall. (the plexiglass acting as a safelight) the selling point for Ilfospeed was that with their new machine, one could have finished, Glossy, prints in about the time that one formerly could get damp stabilization prints. the included developer was no doubt added to make sure that the process would work.
The folks givng the demonsration actually made a batch of prints, and ran them trough the machine so they could give everyone who was watching a print, to show that the process gave good blacks, good contrast, and a nice gloss. they had what was probably a very carefully made image of a professional model bringing a ripe strawberry to her mouth. I found the sample print in one of my files of literature about 30 years later and indeed, the print was still UN-faded and unstained.
I would guess that the ilford stabilization process was discontinued, and the customers who had one of the processors were told they should switch to using Illfospeed paper.