I had thought about this as well. In my mind, a combination of MPCNC and Makerslide was kind of what I envisioned, but that was prior to really looking into what was possible with the MPCNC and conduits.
I was imagining more of a dedicated table though, with 10′ conduit flush on the work table for the Y axis, and using the makerslide to get a nice and rigid X axis.
SOOO Many possibilities. Makes me wish I was better at doing design work.