The thing about the entire MFK 700 system is that until you use it, you just have no clue all the productive things it will do for you.
Although I have taken all of the Festool USA End User Classes, and we used the MFK 700 in some of those, to me it seems to take forever to adjust one for a given task. The upside is that once adjusted, the MFK 700 stays adjusted forever.
Now the wonderful thing is you can buy the router part alone at a savings. The kit comes with more than one base, but another base is sold separately. When you remove the router from one base to use it on another, you need to start the adjustment process all over.
In the real world of production trimming, you need to go back and forth from trimming the top of self-edging to trimming the over-hang of the top. To me these are tasks best performed by the vertical base and the zero degree base, which is an optional extra. The one and a half degree base is very effective trimming typical thin hardwood self edging because the slight slope makes it far less likely you will mar the main surface.
So almost from the introduction in the USA of the MFK 700 system, I bought the kit and the optional zero degree base. As I gained experience I bought two of the basic routers, so I could leave each kind of base set up with the appropriate bits and of course with the router motors.
In my shop 3-10mm thick solid hardwood edge banding is being attached to something over 8 man hours a day. Primarily this is the chore of the one and a half degree base. In a rush two of us might be trimming and if we had to swap router elements, we would lose precious time. Therefore I own 4 of the 1.5 degree bases and motors for them. These days we do hardly any high pressure laminate work, so I only keep one each vertical and zero degree set up. But I do have one spare motor not set up on any base.
My calculation is I made back the cost of those routers the first year. Wasted labor is a cost I cannot recover. But if I have to do so, I can always sell well maintained Festools for a major percentage of their original cost. So in the case of my MFK 700 I cannot lose my investment.