My mum has it. She used to run rings round everyone, physically. She 's smoked from being 15 but has cut down dramatically, now, with the help of e-cigs. When she was younger and fitter, she never seemed to think it would catch up with her but it has. Thankfully, it's not at the extreme end but it's bad enough. So, really sad to learn that Richard Briers has it as I've always thought of him as a bit of a gem.
ETA: Some of the comments following that article were awful.
Still, what do you expect from a certain subsection of DM readers.