Unless we go full electric I don't think more than 4 manufacturers is possible in this day and age.

The championship isn't popular enough to accommodate more imo. You saw with Citroen that unless there's a realistic chance to win, then it'll be a no-go for manufacturers (besides Msport).

That's why I hope Hyundai haven't fucked themselves with the late development of this rally1 car, because they will walk if they have a fundamentally flawed car. Tanak and Neuville at least sound optimistic though, so fingers crossed.

You could argue Toyota are only even in the championship because of the love the president has for the sport.