I have a DeWalt track saw with DeWalt track and clamps. The only useful knowledge I have is of the clamps for this topic. They are normal squeeze clamps similar to Irwin's clamps. They are not as strong as steel clamps but I think they are easily sufficient to keep a track saw track in place. I often do not use a clamp, sometimes I cannot, and usually that works fine. But with the clamps in place I have never had the track move. I think they will last indefinitely for this sort of use.
I am not saying Festool clamps are not better. I have their clamps for clamping pieces to a work table and I like them. But DeWalt clamps for the guide rails are also fine clamps IMHO.
I am not saying Festool clamps are not better. I have their clamps for clamping pieces to a work table and I like them. But DeWalt clamps for the guide rails are also fine clamps IMHO.