Run the thing offline. You don't need a website. You don't need updates. You don't need the OS to be supported. Just a computer with a GPU, a screen, speakers,

Run the thing offline. You don't need a website. You don't need updates. You don't need the OS to be supported. Just a computer with a GPU, a screen, speakers, and a microphone. Maybe a webcam. All the state/memory it could need could fit on a small internal NVMe drive. All of that stuff could be integrated into an all-in-one PC so you just need to plug in power. Perhaps have a switch to wipe its memory/revert to a factory filesystem snapshot if the person moves out or dies. It's not clear to me whether the idea is a good one in the first place, but assuming it is, you don't have to make everything in tech be a recurring revenue stream.