Content mills prefer writing without reference to events that will date the material later. Such writing is dubbed evergreen meaning always new.
The browser as a computing platform faces a different challenge: how to advance at all when users refuse to update to newer versions. Silent automatic updates have been generally accepted and now include numerous nudges for those who fail to turn this feature on. Hence the evergreen, always new, browser.
More about the six week browser dev cycle.
More about propagation of yearly javascript standards.
Example of async/await performance enhancement.
More about the true cost of lasting development.