While Forth is certainly a mind-expanding experience, I still feel that it suffers a bit from "Stackholm syndrome" when I see advice like that contained on page 144, under the section "An alternative to screens: source in named files":
Infnite-length files allow sloppy, disorganized thinking and bad factoring. Defnitions become longer without the discipline imposed by the 1K block boundaries. The tendency becomes to write a 20K file, or worse: a 20K definition.
Or perhaps this advice is just ahead of its time or beyond the mainstream or however you want to put it. The idea of accepting any constraint on the amount of code we churn out is alien to us. We take for granted that complex systems must grow arbitrarily large. What if we're wrong?