No "mono movie" mode like Yamaha amps have, or one to spread the sound around your speakers? What do you do with an old movie that hasn't been remixed?
I saw Singin' in the Rain on the big screen last year, and the mono was pretty darn good. Theaters had great sound systems even in the 50's, and mono was not being pumped out of one tiny speaker.
Stereo tv broadcasts have been around since the mid 1980's. (And there was FM simulcasting before that.) I noticed a lot of old shows like I Love Lucy were processed on the fly into fake stereo at the time. Not sure when or why that practice was discontinued.
I am not opposed to remixes done with respect and care. (Something that wasn't done with the '94 SE DVD of Star Wars.) But, when it's done to movies where the original personnel are no longer around, that's when irritating mistakes creep in. Wizard of Oz and Pinnochio are good examples of this.