I'm using Unpoly (https://unpoly.com) instead of htmx. One thing that, sometimes, makes me consider pairing it with jQuery are the components built around it.

Stuff like datepickers, autocompletes and whatnot are very consolidated in jQuery world. Sure there are options for vanilla JS but they are not mantained or do not have all the features.

These components are being built for the Reacts and Vues frameworks these days.