I note that the phrase "on every aircraft" has been used for MRTC. Not true. I flew AA SFO-STL-LGA July 3/4; since it's a TWA flight operated by AA, MRTC did not apply.

I'm a former United 1P, but I prefer AA's MRTC to E+. No matter how full the plane or how late you get added to the passenger list, you get MRTC.