At least as far as Hacker News is concerned, I'd call htmx way more marketed. It has hundreds of HN submissions in the past year alone [0] including one that broke 1000 points. Compare that to Hotwire which is sitting at less than 30 submissions in the past year [1], the most popular of which is this one.
[0] https://hn.algolia.com/?dateRange=pastYear&prefix=true&query...
[1] https://hn.algolia.com/?dateRange=pastYear&prefix=true&query...