I don’t think you realize just how widely used some of those other models are… For instance, in gaming, DLSS is supported with every Nvidia GPU starting with the 20 series and up.
DLSS uses multiple machine learning models for things like predicting object/pixel movement, generating new frames between what you would normally be able to achieve, and then upscaling that image. Which is also why you want to download the latest drivers since those models are better trained for the more recently released games.
I wouldn’t call that a “small fraction” by any means.
But, maybe your referring to the amount of focus that the news has on LLMs like ChatGPT?