Why Not?
I have a recent Saturn and we just bought an even newer one a few months ago. All the parts are available, all the warranty work still gets done by our dealer and we don't have any issues since the brand is dead. The cars are just as good today as they were when Pontiac was still around and the prices dropped a lot since Pontiac and Saturn are dead that you can get a pretty darn good deal!
The lower prices made the deal flaming hot. These cars lost a lot of value when the brands were killed, they wont lose more, now they just depreciate like any other car.