Mark, I identify with the words of your first paragraph,
We modelers are all getting older. We know that. The hobby itself finds itself later in its own life.
Sometimes life blindsides us unexpectedly with change. Sometimes for good - sometimes not. Eye sight, skills, patience, and energy diminish. It takes longer to do the daily things that we must.
I agree with the " dining room table " approach. I have always pretty much done one model at a time. Fought them all the way to the end. Now, I have several not completed, but when the stars all line line up, I piddle a bit with which ever one suits my fancy. I may get some done and I may not. Just doesn't seem so important any more, although I still need some diversion from a world gone crazy.
I really like your Buick.