These things only become static "messes" or "blighted" because regulation prevents fire sale and pivot to a new use from being viable.
Edit: People really seem to be ignoring the sentence prior to this edit. For a hundred years it was common for old industrial sites of all shapes and forms to have their equipment if any remained scrapped and then be subdivided among small tenants. Most space leased by smaller businesses in the eastern half of the country probably fell into this category until fairly recently.
Many of these projects are making messes to local infrastructure, the construction and municipal costs associated with that, the wear on local roads, etc. And abandoned buildings are a mess because of their lack of maintenance.
Data centers are essentially an Amazon distribution center that is filled with servers instead of racking with a shitload of electrical and HVAC equipment.
Local municipalities are having to upgrade municipal infrastructure as a result of these projects -- which wouldn't be too bad, if they can be guaranteed the tax revenue to pay for those things -- and the employer sticks around and maintains their property.
But in a bubble, it is foreseeable that many of these properties will go under when the bubble pops, and local municipalities will be left footing the bill without the tax revenue.
Then they could pass a law requiring the data centers to pay for these instead of banning them outright, should sort itself out no?