Sure jQuery as a selector engine has more or less been replaced, css has advanced etc.

But the jQuery UI widgets are battle hardened and easier to deploy, case in point , date pickers, calendaries and well, slideshows.

And you can kind of replicate some of reacts behaviour regarding state management.

If all you need to do is keep state on a handful of elements, there is no need to develop in react.

Infact, just like the jquery heydays, react is often overused, for the most simply web forms, menus, footers.

And, no need for router and other state management tools.

Might be a bit unpopular, but when its all said and done, its compiled to js either way, I kinda like jquery or vanilla js for the front end and node/express for the back end.

The amount of react devs which struggle with css and vanilla js appears to be higher than during the jquery days.