Elon Musk is trying to use his current influence to make shibanu better but I think the chances are very slim, I prefer the coins you mentioned over the current shibanu.
When the opportunity came, it seemed that Dai was better suited for now than shibanu, but that's Elon Musk, he tried new things that no one thought of, like when dogecoin wasn't an option back then, he chose it instead.
Seems like he promotes very small projects and picks him just randomly. That's why I mentioned other coins that are not very popular, but worth of attention. I think that stable and private coins are now of more interest as they provide more opportunities.