This is cool - similar to Sarcophagus in the crypto world, but based on CloudFlare workers instead of a Blockchain. Assuming I trust that it works as intended and the site doesn't have access to my data, I'm still trusting 1. That CloudFlare workers will still be around after I die. 2. That you, the site owner, are still paying your CloudFlare bill. 3. That the cryptography behind it hasn't been cracked. 4. Governments haven't come in and forced you or CloudFlare to delete encryption keys because of some info they didn't want to leak. That's a lot of ifs.