The writing has been on the wall for the Siri face after it wasn’t updated with the new widget system last year.
It never lived up to its promise, but it was great at surfacing things like timers, reminders, game scores, heart rate, alarms, activity rings, weather, now playing, shortcuts, and calendar events without having always-showing complications.
It’s been my watch face since it debuted and there’s nothing even close that can replace it.