"You are right, that is not a use case for GIF or equivalent formats. "
It is not, but this was still the main use case of gif - sharing short video sequences.
With crappy quality, but it played everywhere.
Apng is not the successor to that. Webm is, or will be.
So there might be niche cases in UI or games, where apng might make sense, but in most cases, I doubt people would see a difference between apng and webm - but they will notice faster or shorter loading times.
It is not, but this was still the main use case of gif - sharing short video sequences. With crappy quality, but it played everywhere. Apng is not the successor to that. Webm is, or will be.
So there might be niche cases in UI or games, where apng might make sense, but in most cases, I doubt people would see a difference between apng and webm - but they will notice faster or shorter loading times.