I think it’s mostly that grok is not used in a serious way. You don’t see research or open source projects that support it like, say, anything from OpenAI, Anthropic, Facebook…
Grok exists because of Elon’s vendetta against OpenAI (and Sam Altman) and how “woke” and “censored” ChatGPT is. So he spent boatloads of capital to create a rival that all the RWNJs on Twitter will pay for Twitter Premium to do things like “haha I asked Grok why did the gas chambers at Auschwitz have wooden doors” or to generate fake images of Donald Trump caressing Kamala Harris’ pregnant tummy “for the lulz”