I am on this flight now. This flight landed at 7:30pm 8/18/2019 and for the next hour has been stopped on the tarmac. According to the pilot the delay is due to awaiting another plane to move so this flight can get to the assigned gate. The cabin has become very hot. Passengers are becoming very vocal and hostile. I would like to suggest looking into the root cause of this problem and taking corrective action to ensure it does not keep happening. I would also like to suggest providing more options such as the ability to dock at a different gate when this happens again. This has personally cost me an important business opportunity already and I will be late for a second opportunity and that negative impact on me is very unsatisfactory. Please look into this incident and take corrective action. Thank you.