My last table had them, the new table doesn't and I haven't missed them so far. Old table had the fence tighten down on t tracks. This one just clamps to the edges of the table like the Router Workshop did on their show. I don't have a preference for either but the old fence on tracks did loosen off on me a couple of times and the clamps never have.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.