Ask HN: What are some free startup ideas you wish someone would just build?

It is possible to create a digital substitute for loved ones who have passed away. This can be done by using large language models (LLMs) to customize a special chat AI that can interact with the deceased's social media records, photos, videos, and other information. This can be a great comfort to the deceased's family and friends, as it allows them to continue to communicate with their loved one in a meaningful way.