What are the differences in versions

To remove nfz we cant be any higher than 01.04.0300.    So what is the advantage of .0400 or .0500?    I cant find a description of the different versions.

There are a few ways to see DJI release notes. Look for their notes on the forum, or use DankDroneDownloader if it has the firmware. This is something we may address in a future NLD release.

The ONLY differences were the support of dji goggles and bug fix for phantom 4 pro V2. Nothing for mavic flight parameters or anything. In other words, if your on 01.04.03, you are not missing out on any features. I think .05 just had stuff added for mavic 2. My bird is flashed so firmware doesn't show up when it 'tries' to check for updates so I can't read off the exact release notes.