This is one subject that I have been contemplating myself. A couple shortcomings of the MFT from my perspective is when using it for a cut off table, typically I am cutting sheet goods which are 4' x 8'. It is way too small of a surface to be useful. Even if I add additional (And expensive) MFT's I can't get it wide enough. I need to slide a sheet in, establish an endge that is perpendicular to the track, then measure and cut. I can get around that by building a table large enough, throw on the sheet goods and cut. The problem and this is a design issue with the MFT, is when I go to cut an angle. The angle unit sets the material angle, not the track on the material. And what I need is to be able to keep my sheet goods in place once I establish the edge is perpendicular, and move the track to establish the angle and cut. This is where the Festool MFT angle device fails.
I do not see the INCRA device using either the rails or the Router mount as a solution to this issue. I have thought about using the rail systems mounted on teh outside of my 4x8 table as a means to resolve this issue, but once again, the rails and teh INCRA fence system are not wide enough as well. So it is back to square one.
My solution is to purchase the hinge parts and another track and purchase several of the long extrusions found on the MFT sides to give me some movement while maintaining that perpendicular to the edge that I established previously and using the stops they sell for repeatability.