Also the online setup may be confusing to the parents, depending on their experience level. And something may break in the online setup, some update becomes nec

Also the online setup may be confusing to the parents, depending on their experience level. And something may break in the online setup, some update becomes necessary, some library breaks, the server is down etc. etc. Too many things can go wrong. That's fine for a low stakes hobby thing, but not really for the "I became incapacitated" alert system. Having friends check up on you, giving copies of apartment keys to trusted friends and parents, providing some form of access to your bank account to your parents if you trust them, keeping an up to date physical list of banks and other places where you store money and so on is more important. It's already difficult to keep all this info up to date. Keeping a technical solution maintained is just extra distraction from the main points. The key difficulty is anticipating all the issues that will pop up when you actually die, practical stuff like interactions with banks etc. What will your parents need to know? What untied loose ends do you leave behind? It's uncomfortable to think about these things so most people put it off.