@santiago
I agree, definitely technically possible, but lack of persistent connection and tables for representation would make it suboptimal.
Also, although Lagrange, that most use, does preload images, AFAIR they aren't supposed to be inline in gemtext, so showing thumbnails, but providing larger resolution images on request would also pose a challenge — they would have to be on their own pages, which in turn can be automatically generated, something like that 🤔