Just to add a bit of clarity to the conversation, a cabinet saw or any tool with a 4" or larger port will require a high CFM dust collector, a festool dust extractor will be ineffective. With the portable jobsite saws (which usually contain 2.5" ports) the Festool extractors can be used, but they are marginally effective (say 50% for arguments sake). The flow usually isn't enough and neither is the encapsulation around the blade to maintain the air velocity created by the extractor and capture the dust. I have a skilsaw connected to a Festool extractor that falls into this use case. I use it in my basement shop on a very very limited basis because too much dust escapes, but it is far better than not using any dust collection. I try to limit it's use to the outdoors with my back to the wind. The tool wasn't conceived with good dust collection in mind.
There are two exceptions that appear to have given thought to dust collection above the table (and I would assume below the table as well - although I can't confirm). The one dewalt model mentioned above and the sawstop are the only two portable saws I can recollect that have extraction ports over the blade. And if they do a good job of encapsulating the blade, they will work pretty well with a vacuum or portable dust extractor like a Festool. Will it be enough to prevent fine dust from getting airborne? Probably not, but it's probably far better than the results you get using a Festool extractor on any other jobsite saw which wasn't designed with dust collection as a priority.