@beep @mwichary I see this as a “yes, and” kind of feature. I would love to see a “content cascade” where alt text can be in EXIF data, and then overwritten with alt text. Like with CSS, style attributes override the stylesheet; alt text can override EXIF data.
“The process of adding a new category of metadata to even a single image standard is a Herculean undertaking.”
— EXIF is a cross-file-type standard that exists, and adding one field seems very doable to me. Font specs regularly add to their naming tables; I don’t see why image specs can’t.
I see this as another tool to help with some workflows, not a change to how we do things. Adding alt text to EXIF data seems like a useful tool to have in addition to the wonderful tools we already have.