Image Alt Text Adds to the Page Content
Adding alt tags adds content to the overall page.
Search Console Search Analytics Includes Universal Search
The Search Console impression and clicks data includes universal search results like images which might be misleading.
Organisation Schema Logo URL Can Be on External Domain
If you include a logo image URL schema tag for Google, it can be on an external domain.
Image Re-Crawling Takes Longer After a URL Change
Images are not crawled very frequently, so when you migrate them to new URLs/domains, it will take a lot longer than pages, perhaps months.
Creating Separate Landing Pages for Original Images
Create separate landing pages for any original images, which should be linked internally, so these can rank in Google web results.
Put Images on Unique Pages
If you have good and unique images on your site, they might benefit from having an individual page to help Google understand the relevancy of the image.