Yes, because it's still good at what it does. It has nothing to do with es6 that's just a new version of the JS-language so it's irrelevant to add this to the decision.
JQuery can be written in ES6 the problems jQuery tackles are not magically gone.
If you get a declarative project that delivers the payload in HTML you probably still will need such a framework. The ecco-system is alive.
Don't get me wrong complex pages that are highly interactive should be written in a "real" Frontend-Framework because state is one of the complex topics.
but writing a "low-budget" template or an static content page you probably could use jQuery for a slideshow or whatever.
Think of countries with bad internet they still use "progressive enhancements" because it's better to have a 4kb everything is useable but not fancy than a 4mb nothing works for 6 minutes fancy SPA.
Just saying know your customers, your target audience than decide .... absolutism is usually wrong