Mattermost automatically stores all captured images as "image.png."
So, there are too many "image.png" files on all channels.

If filename contains its datetime and the publisher's shortened ID like [Pete_230814-0848.png],
the user will be able to search the image file more easily.

To be specific, it's a bit cumbersome to find a specific image file now.

Most people are seeking an image file directly from the recent file list through the view info icon(ⓘ) and voila, there're dozens of image.png files.

Although I've learned using following command works for that,
[:from:Somebody in:Somewhere image.png]
there's no guarantee of knowing the uploader's ID.