My grandma had triple bypass surgery and was on coumadin (anticoagulant) for the rest of her life (not sure if she was on it prior- she did have a pacemaker already). I'd get a second opinion for sure.
I would have thought 8 years is easily enough time, and I'm sure a clotting factor blood test has been performed. After my initial stent I was taken off plavix after 2 years and had no problems at all. I am obviously on aspirin for life.
I forgot to mention, when I had my bypass surgery, I was not given plavix at all. I was only taking aspirin then.
There may be exceptions, but plavix doesn't outweigh the probability for excessive bleeding for almost all conditions except plavix seems to be helpful to prevent blood clotting at a site that has been stented with a drug eluding stent specific for for the clotting issue... discontinued after a year. It is not a settled issue and opinions continue to change.
Your cardiologist is in a position to know what is best for you, and the risk of excessive bleeding is risk I wouldn't take!