The advantages?
It's cheap, about $4.50 a can at Advance Auto Parts,
It's very effective, at least in my experience,
It's low-tech. Mostly naphthates and other distillates,
And it's got a track record. It's not very scientific, but it seems like all salty dogs love it.
Plus, the cloud of white smoke you can make when you run it through a vacuum line is absolutely impressive. It looks like it's doing something.