Let's Encrypt is a massive achievement, and is now essential infrastructure. Basing it on an open protocol, so it doesn't become a single point of failure, was

Let's Encrypt is a massive achievement, and is now essential infrastructure. Basing it on an open protocol, so it doesn't become a single point of failure, was a clever idea that allows the idea to survive the demise of any single organization. May there be many more such anniversaries.