If it aint broke... 
(but sometimes knowledge is still helpful, so when things go astray...)
Rick, sort of agreed.... a bit of semantics on a cabinet saw, as you can argue the blade is skewed in reference to the the fence, as the two only reference each other. (excluding use of the miter slot, for cross cutting)
Regardless, it's the same net effect...i.e. the cut kerf for both scenarios = blade kerf + skew amount (over blade length in the wood). Either way, you end up with a wider kerf vs. the thickness of the front teeth.
In the Cabinet saw scenario, the "cut" itself remains parallel, even though the fence is skewed, as there is a fixed distance between the cutting teeth and the fence, that never changes as wood travels. So the "cut" always remains parallel to the boards reference edge against the fence. The analogy for Festool would be, throughout the saw travel, the cutting teeth are always the same distance to the rails reference track.
Interestingly enough, with the cabinet saw, there is two references in play that determine cut parallelism, 1) the reference edge of the wood, AND, 2) the straightness (and flex) of the fence. With the Festool, only 1, the track itself (less variables = less errors, all else being equal of course) This is why IMO, the two compliment each other so well... the rail system is ideal for long cuts, and the CSaw ideal for short cross cuts.
(but sometimes knowledge is still helpful, so when things go astray...)
Rick, sort of agreed.... a bit of semantics on a cabinet saw, as you can argue the blade is skewed in reference to the the fence, as the two only reference each other. (excluding use of the miter slot, for cross cutting)
Regardless, it's the same net effect...i.e. the cut kerf for both scenarios = blade kerf + skew amount (over blade length in the wood). Either way, you end up with a wider kerf vs. the thickness of the front teeth.
In the Cabinet saw scenario, the "cut" itself remains parallel, even though the fence is skewed, as there is a fixed distance between the cutting teeth and the fence, that never changes as wood travels. So the "cut" always remains parallel to the boards reference edge against the fence. The analogy for Festool would be, throughout the saw travel, the cutting teeth are always the same distance to the rails reference track.
Interestingly enough, with the cabinet saw, there is two references in play that determine cut parallelism, 1) the reference edge of the wood, AND, 2) the straightness (and flex) of the fence. With the Festool, only 1, the track itself (less variables = less errors, all else being equal of course) This is why IMO, the two compliment each other so well... the rail system is ideal for long cuts, and the CSaw ideal for short cross cuts.
