There's actually a lot of very useful and surprisingly "basic" improvements in recent releases. Things like String.replaceAll(), optional chaining operator, pri

There's actually a lot of very useful and surprisingly "basic" improvements in recent releases. Things like String.replaceAll(), optional chaining operator, private attributes/methods in classes. These features allow you to write cleaner code. On the CSS side "content" family of declarations help with optimizations. I usually adopt latest pretty quickly since I can afford ignoring Safari.