I am critical of many decisions of the standard, however I disagree that it has held it back. The effort to standardise has been useful and it benefits Forth that there is now a common language for e.g. new learners to start with, before trying out more exotic Forths. Furthermore, the language the standard defines is essentially as useful (or more useful than) many of the idiomatic Forths out there, all inspired by Chuck Moore's earlier Forth.

Chuck Moore's later Forths were attempts to further simplify Forth and take alternative approaches that simply aren't as useful or applicable to the core of Forth programmers, but that Chuck enjoys. He's often said that he makes his Forths for himself and not anyone else, e.g. why he would write a color-based Forth when some people are color-blind. There have been some more applicable and less applicable factorisations, and I see his continuing influence around in different Forths; some standard, some not.