I think the pros/cons come down to what you need a printer for. If you print mostly flat things, a bedslinger is fine. If you print large parts with sketchy bed attachments like I often do, a coreXY makes a lot more sense. You have no idea the amount of filament I wasted on giant brims and rafts to keep parts from flying off the sheet - not to mention the time it takes to print them.

And then of course, the Prusa XL in particular can be outfitted with up to 5 separate extruders. It has nothing to do with coreXY but it was a big part of why we bought it.