I got hung up for a while trying to figure out why I couldn’t upload media to my Bluehost WordPress install from the Photos app when using iA Writer (or even the WordPress app)… it’s because the file size is currently limited to 512k. The complete lack of helpful details in the failure messages is annoying. But the other side of that is that I don’t need to upload 4 MB egg sandwich pictures, so I’m glad that at least I understand the issue.
To this end, this shortcut is tremendously useful.