Mockingjay PT 2 had such a track. I think all home video should default to a matrixed stereo track and full encoded surround should be an alternate.
Totally agree. Those of us with 5.1 setups are aware enough to remember to switch the track. Honestly, I wouldn’t mind a little pop-up before the movie on Blu-Rays asking which track it should play and explaining that those listening on TVs should choose the basic stereo.