TLDR Linux systems using Secure Boot rely on a Microsoft certificate (from 2011) that will expire on September 11, 2024. After that, new Linux installs using Secure Boot may fail to boot unless the system firmware includes Microsoft’s newer 2023 key and updating the key often requires a firmware update from hardware vendors which doesn’t always happen. It’s crazy that many users are relying on an outdated Microsoft key unknowingly (I will be checking if I’m among them smh) Also great that people are bringing awareness to this