A worth while note, the Ranger is making over $5,000 a unit in profit right now. I think it could withstand a little R&D concerning engines and drive trains.
Changes have already been made to address some of the crash standards and I think their is enough in the coffer to make the necessary changes to maintain market share. As has been mentioned, market share isn't a given... if you have it, keep it. If it costs money to hold it, it might still be cheaper than losing it.