I'd guess it's because it's extremely niche even now. It's not legacy tech finally showing signs of life like fusion, and it can't exactly do anything particularly revolutionary, despite being able to a lot of things at a medium-high level(for example, it can code but GitHub copilot already exists, and it's conversational skills are fairly limited). I would be surprised if GPT 4 or at worst 5 don't get massive representation though.