Randy Jurgensen

Plaion have also released a BD sourced from Arrow's recent 4K remaster, holds up strongly in comparison https://caps-a-holic.com/c.php?d1=19341&d2=19005&c=5415

This disc defaults to a lossless 5.1 remix, however in the setup menu, the original mono mix is included as a lossy alternative for the first time since the dawn of home video. The film was given a stereo remix very early on and remained stuck that way for decades.

See Chris's review

(Britain release only has 5.1)

The Paramount 4K "restoration" is a desecration. It has completely revisionist color timing, harsh HDR, treatment of stock footage, bad encoding, selective DNR and grain management so bad that the entire screen frequently freezes up with only characters moving around in grain soup. It is so bad that the film's restorer Robert Harris publicly washed his hands of it saying essentially the 2007 restoration (with Willis and Coppola supervising) is how the film was intended and made. This is Paramount's modern version done their way. The new 1080p SDR Blu-rays in print are the crap 4K desecration master with the same problems still there just harder to spot and with crap encodes.
The mono option is an unnecessarily processed version of the lossy mono from the 2008 Blu-ray. The 2008 Blu-ray of the 2007 Coppola Restoration while an imperfect outdated disc is LIGHT YEARS better than this 4K desecration. The only truly major issue is that it is very slightly redder than the 2007 finished master as seen on DCPs. The lossy mono on the 2008 Blu-ray is the best version of the original mix known to exist as it is better than the late 80's mastering for VHS and LaserDisc.
DFIC review of the hideous crap 4K Blu-rays: https://youtu.be/0uw6-Kcy_UA?si=ob1nDg0wTCvemjH0

(2025 re-release includes lossless 5.1 and better 2.0 compared to previous editions)

The 70mm mix in 5.1 was lossy on the 4K 2018 pressing, missing from the 2023 pressing for some reason, and then put back on the 2025 pressing in lossless.