Park Road Post used it to clean up the sound in the Beatles Get Back videos. I don't know the details, and I haven't seen the original or Get Back, but apparently the sound in the original was terrible. They used 'AI' to do things like pick out George's (or whoever it was) voice from the rest so they could EQ it separately
Authentic accents seem to be more important than clarity, for some reason. Clarity is somewhere down there at the bottom of the barrel on the priority list, right next to dead cockroaches. I think it's far more challenging to convey a realistic accent while remaining perfectly understandale to the audience. Like, what's the point of voice acting in narrative media if I can't understand a word you're saying? Anyways, try to watch a dub some time if you're proficient in a foreign language. German dubs tend to prioritize clarity in my experience.
Turn up volume on center speaker.
I wonder what percentage of home movie watchers have a centre speaker that they can turn up the volume on? Or is the thinking more that if you don't have a centre speaker you can turn up the volume on, you're not really into movies and thus not part of our target audience?
I can't answer that. It's the solution that worked for me.