Flew American home yesterday. 2 hours before flight, I got a text that it would be on-time. 5 minutes before scheduled boarding, an announcement was made that pre-boarding would start shortly. A couple of minutes later the pilot comes out the jetway and an announcement is made that we have a 1 hour ground stop. Within a minute, I had a text telling me that. While taxiing to the gate after landing, I receive a text telling me which baggage carousal my bags would arrive at.