I’m sorry to hear. Heck, even twenty years ago you could hear a difference. I grew up in Vegas and took for granted that Sinatra was not going to live forever. I regret not seeing him in person. I saw Lou Rawls (met him as well after show. Nice man, kind man) in person and Diana Schurr). Small venues both, in Vegas late 90s. Also, Dr. John at house of blues Chicago around 2000-200. A gal pal and I saw Mose Allison at a tiny venue in Chicago 2004 range, seated no more than 15 feet from him. After he played we went somewhere, then on way back to car, saw him walking outside the venue. Nobody knew who he was, my gal pal and I walked up to him, introduced ourselves, and I told him about how my dad saw him play live way back in the early 60s in Canada while he was in the service (I’m 45). He chuckled, thanked us, shook our hands, and walked off into the night.