You are spot on about this!!! the film can be developed in other chemistry.
I developed a roll of polachrome in dektol 5 minutes 20 degrees. I was hopeing it would process and colour neg rather than colour positive. Sadly something totally unexpected happened. the film was positive and very flat.
It could be scanned to make a good image but as an image to view it was terrible. The Film also had to be fixed and carefully washed to remove the black backing material which was a pain.