More recently Exxon has begun moving employees in several East Coast locations, including Fairfax, VA (Near Washington, DC) and Parsippany, New Jersey to a campus being constructed north of Houston, Texas. This move involves several thousand employees overall.
When the largest public oil company in the world decides to disrupt the lives of thousands of employees, it is not done lightly, but after careful analysis.
One may not approve of Exxon, but they are capable managers of their investments and operating expenses. Their moves are very telling about the state of the East Coast, and New York in particular.
You raise good points there, but some of those moves began some years ago — and are also tied to changes in corporate operations in the aftermath of the Exxon-Mobil merger.