Sablono: Fulcro doesn’t support it directly because it is just a lib add-on, is more overhead, and you can easily use it if you want to. Not sure how it works with SSR.

Sablono doesn't seem to work with SSR last time I checked. Had to integrate https://github.com/arohner/om-html/blob/master/src/om_html/html.cljc into my project to have a hiccup-like syntax. Had to adjust a few things but seem to work so far.