I spent several days with Peter in Chamonix in 2009 when we both were on the Piolet d'Or jury. He was very vibrant and handsome and looked at least a decade younger than his age. His climbing the Eiger at 74 is no surprise to me....I'll bet he does it when he turns 80.
Habeler attempted to climb Everest again in 2000 but failed to do so due to fluid in his lungs.
I saw Christine Boskoff, who perished with Charlie Fowler in China in 2006, give a slideshow in Boulder of Everest 2000, presumably, or maybe even detailing a subsequent trip as late as 2003-2005, as Peter was also there at Everest and I recall she said Habeler was then in his early 60s.
She recounted for the audience that she and Peter Habeler would race one another through the ice fall, timing themselves, and said he was incredibly fit and vivacious. She showed a picture or two of him and he still looked quite the part. Christine was impressed, as were all of us in the audience.