Ideally we would like to credit the image creators for their fine work. A caption is the best way to do that.
Example:

+1 would really like this feature
I am migrating from Medium. This is one thing lacking. I figured out how to import Gist, which is super cool. ❤️
Now that you've raised this - what about accessibility features such as alt text?
Yeah, it was cover pictures I was thinking of. Just checked - this is a neat solution thanks. Niranjan Borawake
Abhiram Ravikumar
MSc Data Science student at King's College, London
I'd like this feature too, markdown supports image captioning. I don't know why Hashnode doesn't. Weird!