Nothing is "wrong" with Jquery. But I literally write vanilla JS faster than Jquery (because I don't use Jquery, so I always have to refer to the docs more often.) Modern JS isn't hard. If somebody has to use Jquery because they can't write vanilla JS they are holding themselves back. So for me, an extra 200kb of dead weight I don't use, would bother me.
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Nothing is "wrong" with Jquery. But I literally write vanilla JS faster than Jquery (because I don't use Jquery, so I always have to refer to the docs more often.) Modern JS isn't hard. If somebody has to use Jquery because they can't write vanilla JS they are holding themselves back. So for me, an extra 200kb of dead weight I don't use, would bother me.