My "reason for buying Festool" was two fold.
1) Sanding, cutting and routing with great dust collection.
2) To use the guide rail in a way specific to my work, ie being able to draw a pencil line of any angle, place the guide on that line and get a joining quality cut in one pass, exactly on that line. The DIRECT placing of the guide on a line and not needing to calculate an offset is part of it. I am not a measurer, I was trained to draw a picture on the ground and build to the lines and measure as little as humanly possible. Less measuring, less error. And I brought that general framing technique with me to the shop and employ it as much as I can everyday.
These two things convinced me the Festools would save me time and they have, but it always comes back to great dust collection in the end.
I did not buy the system for one project in mind at the start.
Nickao