I have considered early college too. I have considered a lot over many years. I know many kids who went to (some times radically) early 4 years college, and they are all successful. Someone who I don’t want to identify could have been graduating college this year instead of finishing 10th grade.
But it’s not the most successful and/or happiest choice for everyone who can do it. I think it depends on what your d’s long term plan is. Academically, all the kids who went to 4 years for STEM early were (often much) more advanced in math than your d who will take Calc AB in Junior, which is just a norm at highly competitive high schools. I see your d is very smart, but not necessarily exhausted what more she can learn from high school experience.
You don’t want to do something just because you can and others can’t. I believe that a radical decision like this should have a good reason and benefits. Make a careful decision. And good luck.
P.S. for someone like your d, privates can be cheaper than in-state, especially after staying till 12th grade.