Much more I think. One of the illusions created by technology today is that "everyone is visible". There's bound to be surveillance footage of you in multiple locations. Some data mining company is bound to have a big file on you regardless of how carefully you cover your tracks on google, and so forth. You've used a social network at some point, even if you used a fake name. You've had multiple IP addresses that can be tied to your name. Someone could end up connecting the dots with a bit of digging.
But the modus operandi of the Unabomber was that he cut himself off completely from the rest of the world. Even back then he didn't use electronics or even electricity. I think it would scare people so much more today that someone so dangerous operated in the blind spots of modern society. The story would inevitably stay much longer in the news cycles too, as opposed to back then when it only got into the news when he bombed new people, and it could be years between the packages.
