It sucks that AZ is leaving. And it is probably too tender right now for “lessons learned,” but here it goes… You can look like a hero for a few years by throwing a bunch of money at a large corporation to get them to locate in Delaware, as Tom Carper did with AstraZeneca. Or you can be more like Portland and Seattle and do the harder work of trying to invest in building infrastructure for new ventures and make the public investments in of quality of life factors that entrepreneurs look for when building companies.
Both methods cost money, but I think the Seattle model beats the shit out of the Tom Carper model.