Well, if this helps any:
My uncle (the youngest of my dad's siblings) died before my grandmother did. He was an alcoholic who smoked. He got diagnosed with cancer and issues in both liver and lungs which cut his life quite short. His wife left him during his bad time as an alcoholic (which then got him to quit drinking) - but then he later found it to be too late, plus the fact he needed to have stopped smoking too. Spent the end of his life living with my grandmother in pain from cancer. He had a great attitude about it all, and kept his chin up but you could tell it was painful for him.
Not a good way to go. So keep up the good work.