The history of CSS vendor prefixes
1. Browsers ship prefixes
2. Sites start using them
3. Browsers can’t unship them without breaking sites
4. CSS Working Group has to standardize them to ensure interoperability between browsers
5. Lesson learned: Browsers stop shipping prefixes
Wait, what? I completely missed that change. In my day, those damn prefixes were just for early days bleeding edge features. This is the seventh worst thing I've learned today.