JavaScript itself barely changes - it's the flavor-of-the-month frontend frameworks that do. What language feature is commonly used now that wasn't 5 years ago? Some nicer builtin Array methods I guess?
There's a lot of dislike on here for Typescript as a backend language. But the difference with the frontend world with its dozen everchanging frameworks is striking. On the backend side, most projects don't even use a framework, and for those that do basically all of them use the same one (NestJS). And the rate of breaking changes on that has been much lower than something like React.
Of course, many will say that this lack of industry-wide adopted framework in itself is what they dislike about it. But it's hard to settle on that golden mean inbetween both extremes when it's the most popular language in the world (in terms of "Yearly new LOC going into production"). Python makes for a good contrast, with a dozen popularish backend frameworks. Not sure if that's really a better situation to be in, there's pros and cons.