I have and my heart goes out to her. COPD is a horrible way to go.
My Dad, who had quit smoking over 30 years prior, succumbed to COPD rapidly over the course of about 3 years. COPD is nasty when it is aggressive, as it was in his case.
He would get winded walking from the car to the front door of the house. I know that it crushed his spirit, because he was so used to doing everything himself, and in the last couple of years, even the most mundane physical task became daunting...