Not all friction feed machines are starter "desktop" machines....
That is true.. And also not what I'm saying. The GX-24 is an entry level desktop machine, I know it very well and use mine every day.
The ones especially made for very long runs are most likely sprocket type ones, where misaligment over distance is a non-issue.
I've yet to see any friction fed cutters that are marketed towards these operations, although something like a Summa S class with take up reel can do reasonably long runs. But the Gerber Edge with its bombsight plotter at my old workplace would easily go through a whole 15" wide roll of media in one go.
The GX-24 however, is only rated within accuracy levels up to 112" (300cm) long runs by Roland themselves. Perfectly fine for desktop use though.
Saying that the GX-24 suck because it can't run for hours and hours unattended is like saying it sucks because it can't cut 30" wide media. Get the right machine for the job at hand and all is well.