You say that, but last summer I got stranded in NYC when an AA domestic last flight of the day went tech and was eventually cancelled: admittedly I asked at the Flagship Lounge desk but I was furnished with vouchers for a hotel, food/drink, and a (shared) car to & from the hotel. I wasn't the only one either as the taxi was most definitely shared with other passengers from the same flight.
They may well refuse to reimburse you if you act off your own volition, but a smiling face and a polite "my flight's been cancelled and rescheduled for the morning, what do I do" enquiry should get something close to 261 levels of assistance if not compensation.