I came looking for the "image information "feature and it looks like is not going to happen any time soon if ever, many points have been mentioned like:
metadata information on a file you are editing will be changed so no need for it : still one may like to see the opened file info, not the realtime one so you can make edition or saving choices based on those metatag)
you can use system properties : of course you can, you can also use photoshop, or an hexeditor or Krita and look for information that way, the thing is it would be much practical to do it from your current application , specially since it is an image editor and you need to view images while editing them, so not very practical to have to switch app to view the properties.
It would be a ton of code :I totally agree, also the fact that the tag ides are not standard , and sometimes not even the format inside the meta information, sometimes all piled up, sometimes with some structure, but, most work is already done if you are willing to add some apache license v2 (this one you dont need to share the code and you don't need to attach the whole project to that license): https://www.nuget.org/packages/MetadataExtractor/
Even with some still unsupported things, it would be more than what there now exists, it would not take much time or code.