It's 50 years since the early concepts in this Forth article were written. A few things happened along the way. ;)

Here is a Forth program with 1.2 million LOC. (It builds in seconds I am told)

Candy is a construction project estimator and management tool. https://www.youtube.com/watch?v=13loLq5qswM

Written in VFX Forth, a native code compiler with C library linker, OOP, Gui Generator and lots of cool stuff.

Comparing hobbyist Forth systems to modern Forth systems is like comparing Small C to GCC or Clang.

*I have no connection to MPE UK except that I have used their embedded compilers in the past.