Actually this article is from today. I suspect you're right that the opinion howver may be slightly dated in info, but not by much. It's got the general limitations pegged. As for 2-3 tiumes the number of SM-3s, that may be possible. But it remains a glaring fact that this is just grossly inadequate. We have 80 or so Aegis cruisers. And only just now three that can engage ballistic missiles?
The number eight comes to mind. Maybe that is the number on the way plus the ones already outfitted with the ABM system.
Well, I suspect it's a lot more than slipping the missile in the VLS cell. I'm sure that the AEGIS radar & combat system needs a considerable face-lift to be capable of being anthing more than a 'shooter'.