I think he's referring to the sport in general, however people have to ask themselves whether the whole sport is in danger as a result of eRX, or just the WRX. In that article he complains about electric, but also that privateers are driven out by the high cost as a result of having manufacturers involved.

Surely if that's the case then having the manufacturers focus on eRX is a good thing? They can go and do that while all the privateer teams (Munnich, DA, probably OMSE, Pucher etc.) can have a championship more like European Rallycross used to be. Difficulty will be getting a promoter.

Interesting that people like circuit owners are speaking out against WRX/IMG, according to the Albatec website "average reach across all platforms per event rising from 430,000 in 2013 to 6.7 million in 2014 and live event attendance was another success story with a 130% increase in fans attending races in 2014." so places like Loheac have almost certainly benefitted, if only in the short term.

http://albatecracing.com/?page_id=10