>The most prominent one is supportive of Rust
It is the premise. Without his acceptance of Rust, we wouldn't be at this point.
But he can't realistically do the relevant rust-accommodation work all by himself.
Not does he seem supportive of Rust enough as to replace the top maintainers he trusts and has worked with for a very long time with those that will extend the red carpet for Rust developers.
Perhaps Linus was trying to be kind. But sometimes, just saying "No." is most kind.
He didn't have the luxury of hindsight. He tried to be accommodating. Now, we are in a situation that is not pleasant for anybody involved.