My husband Ron was diagnosed with stage 4 emphysema 9 years ago. They told us the same thing, but THEY DON'T REALLY KNOW ANYTHING.
Ron started on Advair and a rescue inhaler. He was switched to Symbicort with the resuce. Two years later they added Spiriva to the mix. He JUST went on oxygen this week.
We have been absolutely diligent in keeping him from catching any respiratory ailments. If one of the kids or myself gets sick, we are quarantined. I clean with bleach & Dawn, Lysol and we keep hand sanitizer in the truck to use after being exposed to the "public". Ron doesn't really go many places, so he advoids germs. He hasn't had a cold in 4 years. While the emphysema will never get better, it has slowed down and is very gradual. We haven't had any hospitalizations in 4 years!
Don't give up on Ken.....as long as you keep him from catching colds or the flu he won't have a major event to put him in the hospital.
PM me if you wanna talk about it. I do understand how hard it is to watch, among other things.
Hugs! 
zippity (aka Jean)