We do NOT need to humanize AI.
The page has a @media (prefers-color-scheme: dark) style that causes this, so those in light mode are unaffected.
#111111 is pretty close to black.
According to https://webaim.org/resources/contrastchecker/, the contrast is 18.88:1 and easily passes all of the accessibility tests.
I expect that the problem that Microsoft aims to fix is that people can use GitHub effortlessly without locking into Azure and Power Platform
I don't believe so, and I didn't mean to imply that. Rather just that if they are part of the "Core AI" org then they will likely remain a priority area of investment for Microsoft...right now anyway.
Yes and no. If all you want is a remote git server then no, there's not. But there's plenty of legitimate reasons to use a SaaS tool like GitHub.