I wonder if they have been a user since 1991. If so that's pretty impressive. Given that would be the same year Linus send his infamous newsgroup email announcing his work to port Minix.
Htmx does use javascript under the hood, but just makes it so the developer can use html markdown for more a more interactive environment that's driven sever side. So the initial page load should render, but UI elements might not work as intended.
htmx is more a move back to REST as it was originally defined (aka not json backend).
Digg Gold you say... 🤔