And the solution is nearly always option (a) - which, understandably is the safe option.
I've often wondered when new regs are proposed whether the FiA are brave/ radical enough to go for option (b) if the new regs suit another set of Manufacturers better? New regs tend to be an evolution of the previous regs. It would be interesting if they went in another direction....
Costs are an important consideration for Manufacturers; however, they'll think its worth joining if there is an excellent RoI/ media exposure, etc Does the current WRC offer this? I'm not sure it does.