Dashicons — which currently weigh in at 303 icons in a single, compiled sprite — may be nearing the end of their useful life. As Joen notes, “The block editor uses SVG icons directly, and the rest of WordPress uses the Dashicons icon font.”
Moving forward, an “ultimate” (as in final) release has been proposed. It will “wrap up existing requests (adding 36 new icons),” stop taking new requests, and “focus future efforts on the new Icon component.” ⚙️
