JQuery still has its place in the world. Not too long ago I built a site with Vue.js. It was nice, but didn't run on older browsers (unless adding in some extra libraries). But it started to bloat too because of the extras. So, I stripped it all out one afternoon and implemented the whole site with jQuery instead. You can't notice even a smidgen of slower performance because of it, and the load time overhead was roughly the same. Plus, the JS ended up being 100% gone from the HTML markup, as compared to the Vue.js, which needs it all over the place. So, for that solution at least, jQuery was fine. And... it seems to be fine on mobile devices nowadays to boot. As usual, though, just find the right tool for the job, but IMO, no need to put JQuery in the bit bucket.