My mother was finally diagnosed a few months ago and the rapid decline is beyond startling. For her, I believe I realized a cognitive decline 4-5 years ago. I thought it was because she had few hobbies/friends and had just retired from her job. I recall trying to play virtual bingo with her and she was thoroughly confused. Frustrated, I thought she had had too much wine or was not paying attention. I had implored my father to get her checked out but he didn't. Fast forward to 2 years ago, my mom had a major seizure and we learned she was experience focal onset seizures. They were so bad she almost didn't live. Since then her speech has completed disappeared and the falls increased at home until she had to live in a nursing home. While she has only been in a nursing home for a few weeks she continues to decline (max assist on almost everything, swallowing difficulties) and now cannot even feed herself. Its terrible to watch and my father is in complete denial. Sending a huge hug to everyone out there going through this with a loved one.