OpenSSL-3.0.0 on Flatcar: what to expect?

In the Open-Source Software ecosystem, actions often start with an opened issue. In this journey, it was the flatcar-linux/Flatcar#418 - but before talking about OpenSSL-3.0 on Flatcar, let’s take two steps back. TL; DR : Let’s upgrade to OpenSSL v3 for a whole operating system and spoiler alert, the issue was misleading: almost nothing broke.