Quote Originally Posted by Mirek View Post
It gives an opportunity to join to any manufacturer (unlike the production-based vehicles). That is a big reason alone.
Currently the only demand for WRC manus is to use the chassis of a mass production model; they don’t have to build special homologation cars like in Gr.N/A days.

Most likely, with frame space chassis the FIA will still demand some link with mass production models (name, shape) in order to keep GT manus out of the WRC.