No one else has experienced crushed blacks and blown-out whites with 4K77?
Depends what you mean.
4K77 DNR suffers a complete loss of detail in areas of certain shots depending on the lighting, and scenes with any sort of brightness or darkness skew in those directions pretty heavily. This is on a calibrated 4K TV. I assume this is an issue with the source, but I’ve never seen anyone else mention it.
I’ve noticed it. It’s one of the reasons I still prefer DeEd, even though I’ll be the first to admit Star Wars DeEd has some serious issues in its own right. Nobody brings it up likely because there’s not likely anything to be done about it, and it’s considered tolerable to some, and there are other preservations for those who don’t like it.
Also, you must keep this in mind – if the whites were blown out and blacks crushed in the theatrical showings, then 4K77 has done its job in reproducing the theatrical experience. Lower-contrast sources like negatives and IPs create a different “Blu-ray”-ish look that I (and likely you) prefer, but it may simply not be theatrically accurate.