I wish this had come up on HN (or I had had that idea myself) some years ago when my mother suffered from that same cruel condition, for the last four years of her life. With her body, all her older memories and her considerable intelligence largely intact, she had multiple moments of clarity every single day, in which she fully realized the terrible and hopeless situation she was in. But of course, within seconds this thought and any decisions she might have derived from it dissolved in the black hole of her defective short-term memory. So she would not even have had the ability to take her own life to end this if she wished so. My brother and I tried many things to improve her life somewhat, only very few of those were actually a bit succesful. Two of them were digital gadgets, which we selected to provide some benefit without or at least with just very simple interactions: The best one was an LCD "picture frame" the only feature of which was to show an infinite loop of family photos stored on its SD card - she came to really like it and have it switched on quite consistently. The second one was an MP3 speaker which had a few hours of her favorite music on an SD card as well, and which could be used largely like a radio, just by pressing its play/stop button and volume buttons. This latter one she managed to enjoy at least from time to time. Best wishes to the author and his mom, and everyone in a similar situation.