I doubt if taxes were a major consideration when Boeing started in Seattle (or Renton) in the 1920’s. They moved their HQ to Chicago in the 1980’s, I think.
Sort of, the Boeing family were farmers. Jr. used the family money to start an air mail business that took off and they got a huge contract from WWII buildup.
A major reason for staying was the tax freedom.
They have plants all over the US.