Ive heard hundreds of stories of communities making all these concessions and then a company bailing after a few years anyway.
That is exactly what happened to the small city where I live.
A large, all-American corporation, wanted to bust its Union on their main facility in the Rustbelt.
They gained a lot of city and state concessions, and this being a right-to-work state, did not allow the new facility to unionize.
Long story short, after two, perhaps three years, with the Union up north defeated. They simply. Bailed. Out.
Just like that.